$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcontacts.git /var/lib/mock/f42-build-867852-175840/root/chroot_tmpdir/scmroot/kf6-kcontacts
Cloning into '/var/lib/mock/f42-build-867852-175840/root/chroot_tmpdir/scmroot/kf6-kcontacts'...
$ git fetch origin dd7021a80daa187ee6bde2b75fc7e79fe8178a3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcontacts
 * [new ref]         dd7021a80daa187ee6bde2b75fc7e79fe8178a3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd7021a Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild