From https://github.com/llvm/llvm-project
 * branch                      main       -> FETCH_HEAD
   47ddd941a9de..5d74c045eddc  main       -> origin/main
Your branch is behind 'origin/main' by 1 commit, and can be fast-forwarded.
  (use "git pull" to update your local branch)
Switched to branch 'main'
HEAD is now at 5d74c045eddc Fixup test added in #155573 to work when the compiler defaults to C++20. (#156166)