git push -u origin error: failed to push some refs code example

Example 1: error: failed to push some refs to

git push -f origin master

Example 2: failed to push some refs to

git config --global pull.rebase true
git config --global rebase.autoStash true

Example 3: failed to push some refs

git push origin master

Example 4: you failed to push some refs to git

git commit -m "initial commit"
git push origin +HEAD