git diff of clang-omp

Jack,
May I ask you to discuss all question regarding clang-omp on github here
Issues · clang-omp/clang · GitHub ?
This is not official clang so I highly recommend to use issues page on
GitHub for any questions about clang-omp.

To your question:

Go to your clang directory
try

git diff origin..origin/clang-omp

Best regards,
Alexey Bataev