Comment by mikepurvis

Yes indeed. That said nix typically throws away the .git dir so it would require some work to adapt a solution to nix that operates at the git repo level.

The ideal for nix would be “I have all content at commit X and need the deltas for content at commit Y” and i suspect nix would be fairly unique in being able to benefit from that. To the point that it might actually make sense to just implement the fact git repo syncs and have a local client serving those tarballs to the nix daemon.