Comparing diff between commit in GitHub
Getting diff view between tags is quite trivial to do, just go to Releases and you'll find a button to compare between releases. But lately, I need to see diff between two commits.
To get diff view for different commit, you can visit Github using the following URL:
https://github.com/adityadaniel/nikmat-ios/compare/${first_commit_hash}..${second_commit_hash}
Source: