code: func main() {
  	CheckArgs("<path>", "<revision>")
  
  	path := os.Args[1]
  	revision := os.Args[2]
  
  	// We instantiate a new repository targeting the given path (the .git folder)
  	r, err := git.PlainOpen(path)
  	CheckIfError(err)
  
  	// Resolve revision into a sha1 commit, only some revisions are resolved
  	// look at the doc to get more details
  	Info("git rev-parse %s", revision)
  
  	h, err := r.ResolveRevision(plumbing.Revision(revision))
  
  	CheckIfError(err)
  
  	fmt.Println(h.String())
  }
docs: // Example how to resolve a revision into its commit counterpart