Hacker News Reader

The git repo is on kernel.org nowadays with mirrors on repo.or.cz and GitHub.

But I think they mean here what the official git project ‘site’ is with docs and so on. And that is now https://git-scm.com/ and indeed as the article describes that was initially set up by GitHub people, to promote git

I think some github employees have written code that went into git, but it's not an official affiliation.

The quotes on "official" imply non-official to me. i.e. official seeming to people who don't know any better.

That's why "official" in in quotes. As in: "de-facto standard".

Not really. git-scm.org is the de facto "official" site for the Git project in about the same way that French is the de facto "official" language of France.

They meant exactly what they wrote: GitHub took over hosting duties for the official Git site (because they did).