I am in the process of moving to Git from SVN. In SVN I had multiple eclipse projects in a single SVN repository that is convenient for browsing projects. I was going to move to
Probably, it will be more performant to work with if You will create multiple git repositories.
If You will make a branch, only project's files would be branched, and not all the projects. Small project it will be faster to analyze, to commit. Operations will take less of time.
The log will be more clear also, You could make more granulated configuration if You will have multiple git repositories.