In my case, my HEAD I am working on as a file called otherfile.php which was originally made by cp file.php otherfile.php.
Now, after editing both file.php and otherfile.php for some time, I want to see how much my otherfile.php has changed from the original file.php (whose commit is tagged with branchA).
How can I do this? And does this question make sense?
1 Answer