$ git clone -n https://src.fedoraproject.org/rpms/ghc-StateVar.git /var/lib/mock/f41-build-835801-158649/root/chroot_tmpdir/scmroot/ghc-StateVar
Cloning into '/var/lib/mock/f41-build-835801-158649/root/chroot_tmpdir/scmroot/ghc-StateVar'...
$ git fetch origin cc3eddc7c0d4447f3d284b1e56c7de3e0e735545:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-StateVar
 * [new ref]         cc3eddc7c0d4447f3d284b1e56c7de3e0e735545 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc3eddc bump release