$ git clone -n https://src.fedoraproject.org/rpms/octave-mcxlab.git /var/lib/mock/f39-build-1502736-34941/root/chroot_tmpdir/scmroot/octave-mcxlab
Cloning into '/var/lib/mock/f39-build-1502736-34941/root/chroot_tmpdir/scmroot/octave-mcxlab'...
$ git fetch origin 0b1daf5639ba6c178063948d2b7ec3102cdb929e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-mcxlab
 * [new ref]         0b1daf5639ba6c178063948d2b7ec3102cdb929e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b1daf5 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild