Fork

Suppose I forked a repo for study, then I write a post in which I want to provide a link to the source, and not to my repo. In order to see the repo address on the local computer, I usually open the /.git/config file. It is faster than doing git config remote.origin url
But .git folder does not contains the information where the repo is forked from.
That is, you will have to add it manually.

You can do it this way:

git config --add core.forkedfrom https://github.com/MicrosoftDocs/sql-docs.git

But it’s probably more naturally by

git remote add upstream https://github.com/....git or
git remote add fork https://github.com/....git