Composer 如何自定义 Git repo (不上传到 packagist)

➜  composer  composer install
Loading composer repositories with package information
Installing dependencies (including require-dev)
  - Installing tencent/xinge (dev-master 7646dd7)
    Cloning 7646dd7e82c513fd2729583999d088640628ea27

Writing lock file
Generating autoload files

这是 composer.json 文件

{
    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/hye/xinge"
        }
    ],
    "minimum-stability": "dev",
    "require": {
        "tencent/xinge": "master"
    }
}