Command line required for download using gof3r.

def _cl_gof3r(file_info, region):
        """Command line required for download using gof3r."""
        command = ["gof3r", "get", "--no-md5",
                   "-k", file_info.key,
                   "-b", file_info.bucket]
        if region != "us-east-1":
            command += ["--endpoint=s3-%s.amazonaws.com" % region]
        return (command, "gof3r")