git-sizer
Compute various size metrics for a Git repository
...Ideally, Git repositories should be under 1 GiB, and (without special handling) they start to get unwieldy over 5 GiB. Big repositories take a long time to clone and repack, and take a lot of disk space. Avoid storing generated files (e.g., compiler output, JAR files) in Git. It would be better to regenerate them when necessary, or store them in a package registry or even a fileserver. Avoid storing large media assets in Git. You might want to look into Git-LFS or git-annex, which allow you to version your media assets in Git while actually storing them outside of your repository. Avoid storing file archives (e.g., ZIP files, tarballs) in Git, especially if compressed. ...