$ git clone -n https://src.fedoraproject.org/rpms/loook.git /var/lib/mock/f45-build-17516-501/root/chroot_tmpdir/scmroot/loook
Cloning into '/var/lib/mock/f45-build-17516-501/root/chroot_tmpdir/scmroot/loook'...
$ git fetch origin 195115a683e32111b8d3559165cf92733821c944:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/loook
 * [new ref]         195115a683e32111b8d3559165cf92733821c944 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 195115a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild