how to modify the commit message in git code example

Example 1: amend last commit message

$ git commit --amend -m "New and correct message"

Example 2: edit last commit message

git commit --amend -m "New commit message."

Example 3: git amend last commit message

$ git commit --amend -m "New and correct message"

Example 4: change commit message

git commit --amend
// press enter, editor would open