$ git clone -n https://src.fedoraproject.org/rpms/kf6-karchive.git /var/lib/mock/f40-build-2725526-73116/root/chroot_tmpdir/scmroot/kf6-karchive
Cloning into '/var/lib/mock/f40-build-2725526-73116/root/chroot_tmpdir/scmroot/kf6-karchive'...
$ git fetch origin 2352dc85e7cdde170016c8e92c805a9236760d14:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-karchive
 * [new ref]         2352dc85e7cdde170016c8e92c805a9236760d14 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2352dc8 6.1.0