To github.com:llvm/llvm-project.git
 ! [rejected]                  HEAD -> main (fetch first)
error: failed to push some refs to 'github.com:llvm/llvm-project.git'
hint: Updates were rejected because the remote contains work that you do not
hint: have locally. This is usually caused by another repository pushing to
hint: the same ref. If you want to integrate the remote changes, use
hint: 'git pull' before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.
Command '['git', 'push', 'origin', 'HEAD:main']' returned non-zero exit status 1.