$ git clone -n https://src.fedoraproject.org/rpms/R-littler.git /var/lib/mock/f45-build-6221-347/root/chroot_tmpdir/scmroot/R-littler
Cloning into '/var/lib/mock/f45-build-6221-347/root/chroot_tmpdir/scmroot/R-littler'...
$ git fetch origin 6acb6ae3312d48647e70db5306d118527de36521:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-littler
 * [new ref]         6acb6ae3312d48647e70db5306d118527de36521 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6acb6ae Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild