Diff a git fork

Question

I'm reviewing a set of forks from an original git project and trying to determine the actual differences. Is there a way to do some sort of git diff original-uri fork-uri to get the differences between the current state of the original project and the current state of the fork?

Answer 1

If you add the fork as a remote repository, you can make diff on it:

git remote add original original-uri
git fetch original
git diff HEAD original/master

However this requires to clone the forked repository, don't know how to do without cloning.