This patch fixes the two problems introduced with the latest version of GitPython (namely 2.0.9). The GitCommandNotFound exception now requires two new arguments, 'command' and 'cause'. And the 'command' parameter requires a non-empty string. Change-Id: Icf95ac057cc4df3c56da81c7d0a1ec2fd2104bf1 Closes-Bug: #1637143