$ git clone -n https://src.fedoraproject.org/rpms/rubygem-comp_tree.git /var/lib/mock/f39-build-1458125-33038/root/chroot_tmpdir/scmroot/rubygem-comp_tree
Cloning into '/var/lib/mock/f39-build-1458125-33038/root/chroot_tmpdir/scmroot/rubygem-comp_tree'...
$ git fetch origin d55c05c96bc684f0952c9279c5692162a3094fbc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-comp_tree
 * [new ref]         d55c05c96bc684f0952c9279c5692162a3094fbc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d55c05c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild