$ git clone -n https://src.fedoraproject.org/rpms/sng.git /var/lib/mock/f45-build-36161-701/root/chroot_tmpdir/scmroot/sng
Cloning into '/var/lib/mock/f45-build-36161-701/root/chroot_tmpdir/scmroot/sng'...
$ git fetch origin 711ad69e32f74cb3d7e13c3db22f01f19ccf0dd5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sng
 * [new ref]         711ad69e32f74cb3d7e13c3db22f01f19ccf0dd5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 711ad69 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild