Let's say we've had cloned a handful of project in github and want to use them in the current symfony2 project. For instance : jquery, jqueryui, datatables (jquery plugin), various other jquery plugins and so on. The reason why we clone them is to be able to alter the projects to fit our needs, and to request a pull on github, anyway...
At this point we have different remote addresses, but they all land in the same project. What are best practices to maintain such big and tangled project?