Fix 'update would fast forward.babushka' for older git versions that print remotes as 'origin/blah' instead of 'remotes/origin/blah'.
Fix 'update would fast forward.babushka' for older git versions that print remotes as 'origin/blah' instead of 'remotes/origin/blah'.

closes gh-68

victorklos/babushka,victorklos/babushka,victorklos/babushka