$ git clone -n https://src.fedoraproject.org/rpms/mame.git /var/lib/mock/f41-build-852456-166349/root/chroot_tmpdir/scmroot/mame
Cloning into '/var/lib/mock/f41-build-852456-166349/root/chroot_tmpdir/scmroot/mame'...
$ git fetch origin f254056f9540f0c17d34dda3abe56e2e9499f330:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mame
 * [new ref]         f254056f9540f0c17d34dda3abe56e2e9499f330 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f254056 Update to 0.269