Diff a git fork

Question

I am looking at a set of forks from the original git project and trying to determine the actual differences. Is there a way to do something like 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 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 cloning a branched repository, I do not know how to do without cloning.