$ git clone -n https://src.fedoraproject.org/rpms/kf6-kdeclarative.git /var/lib/mock/f42-build-side-1-3511703-46059/root/chroot_tmpdir/scmroot/kf6-kdeclarative
Cloning into '/var/lib/mock/f42-build-side-1-3511703-46059/root/chroot_tmpdir/scmroot/kf6-kdeclarative'...
$ git fetch origin cd683a6a03d38e48e95d62aa81e35c81da0cc72e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kdeclarative
 * [new ref]         cd683a6a03d38e48e95d62aa81e35c81da0cc72e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd683a6 6.13.0