kbfsgit: Fix runner to correctly account for refspecs.
kbfsgit: Fix runner to correctly account for refspecs.

keybase/client,keybase/kbfs,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client