$ git clone -n https://src.fedoraproject.org/rpms/kf6-kpackage.git /var/lib/mock/f41-build-side-1-2647342-27301/root/chroot_tmpdir/scmroot/kf6-kpackage
Cloning into '/var/lib/mock/f41-build-side-1-2647342-27301/root/chroot_tmpdir/scmroot/kf6-kpackage'...
$ git fetch origin 3b10ba58aed64f2759dca2ea1a79b374b5312ee2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kpackage
 * [new ref]         3b10ba58aed64f2759dca2ea1a79b374b5312ee2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b10ba5 6.5.0