From https://github.com/llvm/llvm-project
 * branch                      main       -> FETCH_HEAD
   7a31f3c76129..21f7c626270d  main       -> origin/main
Switched to branch 'main'
Your branch is behind 'origin/main' by 1 commit, and can be fast-forwarded.
  (use "git pull" to update your local branch)
HEAD is now at 21f7c626270d [LLVM][ARM] Latency mutations for cortex m55,m7 and m85 (#115153)