$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcompletion.git /var/lib/mock/f42-build-side-1-3585386-46904/root/chroot_tmpdir/scmroot/kf6-kcompletion
Cloning into '/var/lib/mock/f42-build-side-1-3585386-46904/root/chroot_tmpdir/scmroot/kf6-kcompletion'...
$ git fetch origin cfbe932b1fd70e52d87c099bbad0003084a5a233:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcompletion
 * [new ref]         cfbe932b1fd70e52d87c099bbad0003084a5a233 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cfbe932 6.16.0