[zufallsheld]

This blog post is from github. They made these changes or git and opensourced them. So yes, they do contribute back.

[ylyn]

> They made these changes

No, they're just describing the new features... that does not mean GitHub actually wrote these features.

[IMTDb]

First paragraph of the article:

> In a previous blog post, we discussed how GitHub was using a new mode of git repack to implement our repository maintenance jobs. In Git 2.32, many of those patches were released in the open-source Git project

It looks like GH needed a better algo for git repack. Implemented a better algo for git repack. And contributed the better algo for git repack to the open source project. You can now use the better algo for git repack yourself without using GH.

It's fair to say they made the change