code: func (h *stiGit) SubmoduleInit(repo string) error {
  	opts := cmd.CommandOpts{
  		Stdout: os.Stdout,
  		Stderr: os.Stderr,
  		Dir:    repo,
  	}
  	return h.RunWithOptions(opts, "git", "submodule", "init")
  }
docs: // SubmoduleInit initializes/clones submodules