Did you know about the Software Heritage project? I think I like it, sounds like the Internet Archive, but for repos, and entire software forges. I just submitted a request to my own "forge" (cgit serving all my public git repos).

«The long term goal of the Software Heritage initiative is to collect all publicly available software in source code form together with its development history, replicate it massively to ensure its preservation, and share it with everyone who needs it. The Software Heritage archive is growing over time as we crawl new source code from software projects and development forges.»
https://archive.softwareheritage.org/

Apparently this is an INRIA project.
https://www.inria.fr/
https://en.wikipedia.org/wiki/French_Institute_for_Research_in_Computer_Science_and_Automation