From github.com:llvm/llvm-project
 * branch                      main       -> FETCH_HEAD
   0ec94983c4cf..1dee12531d60  main       -> origin/main
Switched to branch 'main'
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  (use "git pull" to update your local branch)
HEAD is now at 1dee12531d60 [mlir][mpi] Lowering MPI_Allreduce (#133133)