diff --git a/openstack_releases/cmds/list_changes.py b/openstack_releases/cmds/list_changes.py
new file mode 100644
index 0000000000..140bcbc0e0
--- /dev/null
+++ b/openstack_releases/cmds/list_changes.py
@@ -0,0 +1,132 @@
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+"""Show the changes that will be included in the release.
+"""
+
+from __future__ import print_function
+
+import argparse
+import atexit
+import os
+import os.path
+import shutil
+import subprocess
+import tempfile
+
+import yaml
+
+from openstack_releases import defaults
+from openstack_releases import gitutils
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        '--no-cleanup',
+        dest='cleanup',
+        default=True,
+        action='store_false',
+        help='do not remove temporary files',
+    )
+    parser.add_argument(
+        'input',
+        nargs='*',
+        help=('YAML files to validate, defaults to '
+              'files changed in the latest commit'),
+    )
+    args = parser.parse_args()
+
+    filenames = args.input or gitutils.find_modified_deliverable_files()
+    if not filenames:
+        print('no modified deliverable files, skipping report')
+        return 0
+
+    workdir = tempfile.mkdtemp(prefix='releases-')
+    print('creating temporary files in %s' % workdir)
+
+    def cleanup_workdir():
+        if args.cleanup:
+            try:
+                shutil.rmtree(workdir)
+            except:
+                pass
+        else:
+            print('not cleaning up %s' % workdir)
+    atexit.register(cleanup_workdir)
+
+    # Remove any inherited PAGER environment variable to avoid
+    # blocking the output waiting for input.
+    os.environ['PAGER'] = ''
+
+    for filename in filenames:
+        print('\nChecking %s' % filename)
+        with open(filename, 'r') as f:
+            deliverable_info = yaml.load(f.read())
+
+        series = os.path.basename(
+            os.path.dirname(
+                os.path.abspath(filename)
+            )
+        )
+        if series == defaults.RELEASE:
+            branch = 'master'
+        else:
+            branch = 'stable/' + series
+
+        # assume the releases are in order and take the last two
+        new_release = deliverable_info['releases'][-1]
+        if len(deliverable_info['releases']) >= 2:
+            previous_release = deliverable_info['releases'][-2]
+        else:
+            previous_release = None
+        for project in new_release['projects']:
+            if gitutils.commit_exists(project['repo'],
+                                      new_release['version']):
+                print('%s %s exists already' %
+                      (project['repo'], new_release['version']))
+                continue
+
+            if previous_release:
+                git_range = '%s..%s' % (previous_release['version'],
+                                        project['hash'])
+            else:
+                git_range = project['hash']
+
+            # Check out the code.
+            subprocess.check_call(
+                ['zuul-cloner',
+                 '--branch', branch,
+                 '--workspace', workdir,
+                 'git://git.openstack.org',
+                 project['repo'],
+                 ]
+            )
+            header = '%s %s' % (project['repo'], git_range)
+            print('\n%s' % header)
+            print('-' * len(header))
+
+            # Show the log output.
+            log_cmd = [
+                'git', 'log', '--no-color',
+                '--format=%h %ci %s', '--no-merges',
+                git_range,
+            ]
+            subprocess.check_call(
+                log_cmd,
+                cwd=os.path.join(workdir, project['repo']),
+            )
+            print()
+
+    return 0
diff --git a/openstack_releases/cmds/validate.py b/openstack_releases/cmds/validate.py
index f232bfd168..11e5fe0bab 100755
--- a/openstack_releases/cmds/validate.py
+++ b/openstack_releases/cmds/validate.py
@@ -29,12 +29,10 @@ import yaml
 from requests.packages import urllib3
 urllib3.disable_warnings()
 
+from openstack_releases import defaults
 from openstack_releases import gitutils
 
 
-DEFAULT_RELEASE = 'liberty'
-
-
 def is_a_hash(val):
     "Return bool indicating if val looks like a valid hash."
     return re.search('^[a-f0-9]{40}$', val, re.I) is not None
@@ -53,8 +51,8 @@ def main():
     filenames = args.input or gitutils.find_modified_deliverable_files()
     if not filenames:
         print('no modified deliverable files, validating all releases from %s'
-              % DEFAULT_RELEASE)
-        filenames = glob.glob('deliverables/' + DEFAULT_RELEASE + '/*.yaml')
+              % defaults.RELEASE)
+        filenames = glob.glob('deliverables/' + defaults.RELEASE + '/*.yaml')
 
     errors = []
 
@@ -92,7 +90,7 @@ def main():
                          '%(hash)r, which is not a hash') % project
                     )
                 else:
-                    exists = gitutils.commit_has_merged(
+                    exists = gitutils.commit_exists(
                         project['repo'], project['hash'],
                     )
                     if not exists:
diff --git a/openstack_releases/defaults.py b/openstack_releases/defaults.py
new file mode 100644
index 0000000000..f1e9af06e9
--- /dev/null
+++ b/openstack_releases/defaults.py
@@ -0,0 +1,15 @@
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+RELEASE = 'liberty'
diff --git a/openstack_releases/gitutils.py b/openstack_releases/gitutils.py
index dba66c9c51..2861545d92 100644
--- a/openstack_releases/gitutils.py
+++ b/openstack_releases/gitutils.py
@@ -36,7 +36,7 @@ def find_modified_deliverable_files():
     return filenames
 
 
-def commit_has_merged(repo, hash):
+def commit_exists(repo, hash):
     """Return boolean specifying whether the hash exists in the repository.
 
     Uses a cgit query instead of looking locally to avoid cloning a
diff --git a/requirements.txt b/requirements.txt
index f7f69d5b4c..acdfe13fa4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ argparse
 launchpadlib
 requests>=1.1
 PyYAML>=3.1.0
+zuul
diff --git a/setup.cfg b/setup.cfg
index 4ad190eb93..248bd36c73 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -23,3 +23,4 @@ packages = openstack_releases
 [entry_points]
 console_scripts =
     validate-request = openstack_releases.cmds.validate:main
+    list-changes = openstack_releases.cmds.list_changes:main
diff --git a/tox.ini b/tox.ini
index 98ac5b6544..a414eaac5b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,6 +15,9 @@ deps = -r{toxinidir}/requirements.txt
 [testenv:validate]
 commands = validate-request {posargs}
 
+[testenv:list-changes]
+commands = list-changes {posargs}
+
 [testenv:pep8]
 deps = flake8
 commands = flake8