how to use github (un)official extension repo in your Yii project

Using a git submodule command in your yii project ================================================= I'm developing a web project for a company with yusing Yii framework. We are using a git vcs in our development process.  We like to use yYii extensions. But only if they are good. We are very carefully chossing an extension, if we need something very carefully. If we don't like an extensionits code or something else, we don't use ithat extension. And last time someone noticed, that we are using only extensions from [(un)official github yii extensions repo](https://github.com/yiiext) . But we still need a solution how to use that repositoires independently from our project ? ~~~ git submodule add https://github.com/yiiext/with-related-behavior ./protected/extensions/[extension name] ~~~ This command will add an extension repository under our project extension folder. And any other extension from github (un)official yii extension repo you can add to your project git repo easy.
Then when another coder cloned your repo his extension folders will be empty. He needs to type
~~~
git submodule update --init --recursive
~~~
And then extensions will appear in his repo too.