They wrote a wrapper around it because git took so much time for every basic operations, even a `git status` would take minutes. But still it's not a fork, you

They wrote a wrapper around it because git took so much time for every basic operations, even a `git status` would take minutes. But still it's not a fork, you can either use it or not without impacting anyone else using the repo. And they also made it available to everyone, as how good open source citizens should do.