$ git clone -n https://src.fedoraproject.org/rpms/octave-jsonlab.git /var/lib/mock/f40-build-2119815-50734/root/chroot_tmpdir/scmroot/octave-jsonlab
Cloning into '/var/lib/mock/f40-build-2119815-50734/root/chroot_tmpdir/scmroot/octave-jsonlab'...
$ git fetch origin 9f29b2cefe483675c85c32bc4827e0c28e69aa98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-jsonlab
 * [new ref]         9f29b2cefe483675c85c32bc4827e0c28e69aa98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f29b2c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild