$ git clone -n https://src.fedoraproject.org/rpms/lsfrom.git /var/lib/mock/f45-build-17575-501/root/chroot_tmpdir/scmroot/lsfrom
Cloning into '/var/lib/mock/f45-build-17575-501/root/chroot_tmpdir/scmroot/lsfrom'...
$ git fetch origin c0a8956af4f19bdd57b3dab01f50b7abb32cc596:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lsfrom
 * [new ref]         c0a8956af4f19bdd57b3dab01f50b7abb32cc596 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0a8956 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild