$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcompletion.git /var/lib/mock/f40-build-787149-134734/root/chroot_tmpdir/scmroot/kf6-kcompletion
Cloning into '/var/lib/mock/f40-build-787149-134734/root/chroot_tmpdir/scmroot/kf6-kcompletion'...
$ git fetch origin 31afbde52f38ba134995dbc59d73d1336537dd24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcompletion
 * [new ref]         31afbde52f38ba134995dbc59d73d1336537dd24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31afbde 6.0.0