用os.exec（“ git”，“ clone”）克隆仓库

Running the code below, I expected the github hosted project username/mysuperrepo to be cloned (once I visit the clone path) into the repo where this go project is running, but it doesn't work. After stopping the application, there's no directory for mysuperrepo no any of the files that I would expect from running git clone https://github.com/username/mysuperrepo.git from the command line

Question: Why wouldn't the code below produce a clone of the repo in the directory where the go program is running?

func clone(w http.ResponseWriter, r *http.Request){
  var repo = "https://github.com/username/mysuperrepo.git"
  exec.Command("git", "clone", repo)
  w.Write([]byte(repo))
}
func main(){
  http.HandleFunc("/clone/", clone)
  log.Fatal(http.ListenAndServe(":8080", nil))
}

You need to call Run to actually execute the command.

cmd := exec.Command("git", "clone", repo)
err := cmd.Run()
if err != nil {
    // something went wrong
}