$ git clone -n https://src.fedoraproject.org/rpms/mathgl.git /var/lib/mock/f31-build-53250-27827/root/chroot_tmpdir/scmroot/mathgl
Cloning into '/var/lib/mock/f31-build-53250-27827/root/chroot_tmpdir/scmroot/mathgl'...
$ git reset --hard 11cb479135dc545ad183424afe7487ab6f59e541
HEAD is now at 11cb479 Rebuild for octave 5.1