$ git clone -n https://src.fedoraproject.org/rpms/kf6-kirigami.git /var/lib/mock/f40-build-788029-134983/root/chroot_tmpdir/scmroot/kf6-kirigami
Cloning into '/var/lib/mock/f40-build-788029-134983/root/chroot_tmpdir/scmroot/kf6-kirigami'...
$ git fetch origin b75c79fae9d4c3401a2ff5571b99a78c5e2598b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kirigami
 * [new ref]         b75c79fae9d4c3401a2ff5571b99a78c5e2598b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b75c79f 6.0.0