Speaking of existing technologies, Chris Ball combined the BitTorrent, DHT, and GIT protocols into GitTorrent [1][2].
[1]: https://blog.printf.net/articles/2015/05/29/announcing-gitto...
[1]: https://blog.printf.net/articles/2015/05/29/announcing-gitto...
I think you mean this one (yes, it's still the top comment): https://news.ycombinator.com/item?id=18098416