def test_opts(self):
        """git with non-default command line options"""
        g = git(opts=['--single-branch'])
        self.assertEqual(g.clone_step(repository='https://github.com/NVIDIA/hpc-container-maker.git'),
                         'mkdir -p /tmp && cd /tmp && git clone --single-branch https://github.com/NVIDIA/hpc-container-maker.git hpc-container-maker && cd -')
git with non-default command line options
test/test_git.py