From https://github.com/llvm/llvm-project
 * branch                      main       -> FETCH_HEAD
   5442aa1853df..1f3e2c6b11a1  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 1f3e2c6b11a1 [gn] Let tablegen() add root_build_dir to include search path