Git subprojects for Laravel app

How can I setup groups of controller/views/models as separate Git repos but use them in a single Laravel app?

For example, I want to keep everything related to users in a separate Git repo. That means the user controller, the user model, the user views, the user routes, so whenever I make an update to the users functionality, other Laravel projects that also use this would get the updates by just pulling.

via Chebli Mohamed