$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-liepring.git /var/lib/mock/f42-build-3406868-45143/root/chroot_tmpdir/scmroot/gap-pkg-liepring
Cloning into '/var/lib/mock/f42-build-3406868-45143/root/chroot_tmpdir/scmroot/gap-pkg-liepring'...
$ git fetch origin f43181f63b6ee9c2dcbd13a81a0c52b1b7442b04:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-liepring
 * [new ref]         f43181f63b6ee9c2dcbd13a81a0c52b1b7442b04 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f43181f Add VERSION to %files