$ git clone -n https://src.fedoraproject.org/rpms/mrtg.git /var/lib/mock/f40-build-752692-116820/root/chroot_tmpdir/scmroot/mrtg
Cloning into '/var/lib/mock/f40-build-752692-116820/root/chroot_tmpdir/scmroot/mrtg'...
$ git fetch origin 1eee0038c2aa45f52f1298e949da6b89a9415a53:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mrtg
 * [new ref]         1eee0038c2aa45f52f1298e949da6b89a9415a53 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1eee003 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild