$ git clone -n https://src.fedoraproject.org/rpms/colossus.git /var/lib/mock/f39-build-1550998-36960/root/chroot_tmpdir/scmroot/colossus
Cloning into '/var/lib/mock/f39-build-1550998-36960/root/chroot_tmpdir/scmroot/colossus'...
$ git fetch origin 8847df1cd26c016553ac7d8dd714346ec47ed7e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/colossus
 * [new ref]         8847df1cd26c016553ac7d8dd714346ec47ed7e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8847df1 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild