$ git clone -n https://src.fedoraproject.org/rpms/kf5-kmbox.git /var/lib/mock/f40-build-787357-134746/root/chroot_tmpdir/scmroot/kf5-kmbox
Cloning into '/var/lib/mock/f40-build-787357-134746/root/chroot_tmpdir/scmroot/kf5-kmbox'...
$ git fetch origin dc414a5804d9afbd6a078b9d789a33ff88cb2de2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kmbox
 * [new ref]         dc414a5804d9afbd6a078b9d789a33ff88cb2de2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc414a5 23.08.5