Nirbheek Chauhan authored Sep 28, 2020 and GStreamer Marge Bot committed Sep 30, 2020

git commit will fail if there's nothing to commit. This can happen if
all the commands in the extract step completed successfully, but the
step was marked as failed or was cancelled. In that case, the step
will be tried again and since all commands will be idempotent, there
won't be anything to commit.

Check whether we need to commit before trying to commit.

Part-of: <!622>