We've got an answer for that but fair warning it's commercial, not free. tl;dr: all the data sits in one or more binary server[s] and is fetched on demand when

We've got an answer for that but fair warning it's commercial, not free. tl;dr: all the data sits in one or more binary server[s] and is fetched on demand when you ask for the file. We distinguish between text and binary so you can clone a tree and have all the text checked out and none of the binaries; you set up your build system to check those out as needed.