Take diff of two different git repositories

I have two seperate git repositories at ~/linux and ~/android. I want to make a diff of the two repositories usin开发者_JS百科g git. Or is there any way to merge the two repositories.?

Regards, Murugaprabu

git fetch --all $HOME/android in the other directory and then use git diff in the usual way.

Add both repos as remotes, fetch them and then diff/merge/do whatever you want.