Found error in documentation, looking for advice on how to start contributing

Hi all,

I don't know if this is the place for this question, let me know if I
should send it elsewhere.

I was reading a portion of the documentation today and found a
paragraph out of place in my local documentation, as well as on
https://git-scm.com/docs/git-log and in the git/git GitHub repository.
I have never contributed to an open source project before and I think
this would be a simple place to start. I've read through the readme
and Documentation/SubmittingPatches document, however with the
https://github.com/git/git repository being publish only, what git
repository do I base my changes on for documentation patches?

Thanks in advance,
Dominik

p.s. sorry if this email is a duplicate, this one should be plain text