I am in the process of moving the Doom packages that the Debian Games Team maintain from subversion to git.

I started with a small native package called game-data-packager. The clone operation took hours to run and resulted in a 90-odd Mb git repository. Since game-data-packager is a relatively small collection of shell scripts with a recent history, I have reason to believe that git svn has imported much more of the Games Team SVN repo than just the game-data-packager bits.

After fiddling with git repack -a -d, git prune and git gc --aggressive, the repository is still 80Mb large. How do I determine what is using all this space? Can anyone advise me on the best way to analyse a repository like this?