I'm trying to determine how big a cloned Git repository is from a local file system. It creates hard links for some but not all files. How can I determine the disk usage of it? The best I can come up with is "du -a" right now with the original and again with the clone to determine the difference, since each hard linked file will be counted only once. Ideally, I would just run du on the clone and count each hard linked file zero times.