tree 5cbcbfd147616337aebec9d72b0fd0de3bf34b64
parent 8f82a4f828c2765cc4585f9d749f5155f06fd9e9
author Wink Saville <wink@google.com> 1239393684 -0700
committer Wink Saville <wink@google.com> 1239393684 -0700

Add checkout command.

Teach repo how to checkout a branch in all projects or a list
of specific projects.

Bug: REPO-21