Not an expert either :) There is the concept of submodules which allows for multiple repos while maintaining the checksum mechanics that allows sharing the sam

Not an expert either :) There is the concept of submodules which allows for multiple repos while maintaining the checksum mechanics that allows sharing the same bit of information between branches and across commits: https://git-scm.com/book/en/v2/Git-Tools-Submodules https://git-scm.com/book/en/v2/Git-Tools-Submodules The trick is that git maintains an abstract file system (ie a graph) across commits. The graph consist of pointers to content without having to create a clone of the actual content for every new version of said graph....it gets a little dizzy to explain but it is really not too complicated :)