$ git clone -n https://src.fedoraproject.org/rpms/octave-miscellaneous.git /var/lib/mock/f40-build-793944-139322/root/chroot_tmpdir/scmroot/octave-miscellaneous
Cloning into '/var/lib/mock/f40-build-793944-139322/root/chroot_tmpdir/scmroot/octave-miscellaneous'...
$ git fetch origin a529b6e472884336a1367fc06f7b7a5f3db24d2b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-miscellaneous
 * [new ref]         a529b6e472884336a1367fc06f7b7a5f3db24d2b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a529b6e Rebuild with octave 8.1.0