How to download a github repository or files with curl - php

Question

I have a success to download a repository from github via file_get_content but what is the orientation with curl.
The advantage with the file_get_content it's like anonymous. In this case inside a backoffice, it's possible to download plugin in for example.
But Github restrict this usage at less 10 times, after the user must to wait long time to restart something.
It seems if the curl is used, github allow more access to download a respository.
Do you have an example to use with curl (like anonymous)?
Below an example that I make. It's works fine but it's not possible to use this several times. Think less 10 times.
Thank you
public function __construct() {
$this->githubUrl = 'https://github.com';
$this->githubApi = 'https://api.github.com';
$this->githubRepo = 'repos';
$this->context = stream_context_create(array('http' => array('header' => 'User-Agent: ClicShopping',)));
$this->githubRepoClicShoppingCore = 'CoreofApplication';
$this->githubRepoName = 'addOnNameOfApplication';
}
private function getGithubRepo() {
$url = $this->githubApi . '/' . $this->githubRepo . '/' . $this->githubRepoName;
return $url;
}
private function getGithubCoreRepo() {
$url = $this->githubApi . '/' . $this->githubRepo . '/' . $this->coreName . '/' . $this->githubRepoClicShoppingCore;
return $url;
}
private function setContext() {
return $this->context;
}
private function getGithubApiClicShoppingCoreArchive() {
$url = $this->githubUrl . '/' .$this->coreName . '/' . $this->githubRepoClicShoppingCore.'/archive/master.zip';
return $url;
}
Thank you.