From github.com:llvm/llvm-project
 * branch                      main       -> FETCH_HEAD
   21b607adbeb4..6b16a276ef8f  main       -> origin/main
Switched to branch 'main'
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  (use "git pull" to update your local branch)
HEAD is now at 6b16a276ef8f [libc] Add startup code for ARM v7-A, ARM v7-R variants (#153576)