$ git clone -n https://src.fedoraproject.org/rpms/kf6-kpackage.git /var/lib/mock/f45-build-15084-468/root/chroot_tmpdir/scmroot/kf6-kpackage
Cloning into '/var/lib/mock/f45-build-15084-468/root/chroot_tmpdir/scmroot/kf6-kpackage'...
$ git fetch origin c0ec6b8794c625dc1c508d630bbb41d71a634edb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kpackage
 * [new ref]         c0ec6b8794c625dc1c508d630bbb41d71a634edb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0ec6b8 6.31.0