.net - What's the best way to setup git when having common code that should be used in several repositories? -

I'm the one in a development team. I am working as NET developer, where we are using Kamban for our software development process. We are currently using Team Foundation Server for source control and there is a branch-by-feature strategy to ensure that we all have a releaseable code.

Since there are some "limitations" in the team foundation server, we are going to go to Geethub to get more flexible equipment.

For there, I wonder what is the best way to set up GIT when you have a general project that should be used with many solutions / applications? Should it be a repository of itself? Yes, every project (and I mean, that the word does not mean the studio meaning of that word) is its own self.