$ git clone -n https://src.fedoraproject.org/rpms/slapi-nis.git /var/lib/mock/f40-build-2041891-48479/root/chroot_tmpdir/scmroot/slapi-nis
Cloning into '/var/lib/mock/f40-build-2041891-48479/root/chroot_tmpdir/scmroot/slapi-nis'...
$ git fetch origin b68c7e2064b405596a93a99649c3bc6dfac19e42:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/slapi-nis
 * [new ref]         b68c7e2064b405596a93a99649c3bc6dfac19e42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b68c7e2 Ignore updates from non-tracked subtrees during modify/modrdn/update to avoid deadlocks with retro changelog