Here's a project of mine (1500 commits) visualised in gource: https://www.youtube.com/watch?v=szhYhph4C2U

My command to run it is:

gource --key -e 1 --auto-skip-seconds 1 --max-file-lag 1 --time-scale 4 --seconds-per-day 1 --highlight-dirs --dir-name-depth 2 --multi-sampling --user-friction 0.1 --font-size 20 --caption-size 20 --viewport 1920x1080

I'm at about 3000 commits now but I'll probably wait to render out a new one half way through next year after I get back onto the project and finish another chunk of changes.