$ git clone -n https://src.fedoraproject.org/rpms/rarian.git /var/lib/mock/f45-build-34322-684/root/chroot_tmpdir/scmroot/rarian
Cloning into '/var/lib/mock/f45-build-34322-684/root/chroot_tmpdir/scmroot/rarian'...
$ git fetch origin 0044112684109c5d20a8f9d797b276836a7b6182:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rarian
 * [new ref]         0044112684109c5d20a8f9d797b276836a7b6182 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0044112 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild