$ git clone -n https://src.fedoraproject.org/rpms/kf6-kdoctools.git /var/lib/mock/f42-build-side-1-3582487-46885/root/chroot_tmpdir/scmroot/kf6-kdoctools
Cloning into '/var/lib/mock/f42-build-side-1-3582487-46885/root/chroot_tmpdir/scmroot/kf6-kdoctools'...
$ git fetch origin d0907f11f4f769af7c01e7d8b907b857a4ed2ed7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kdoctools
 * [new ref]         d0907f11f4f769af7c01e7d8b907b857a4ed2ed7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0907f1 6.16.0