$ git clone -n https://src.fedoraproject.org/rpms/libspectrum.git /var/lib/mock/f45-build-17026-495/root/chroot_tmpdir/scmroot/libspectrum
Cloning into '/var/lib/mock/f45-build-17026-495/root/chroot_tmpdir/scmroot/libspectrum'...
$ git fetch origin d3d293406e3d7df15ac17774604429725674bef7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libspectrum
 * [new ref]         d3d293406e3d7df15ac17774604429725674bef7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d3d2934 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild