Amending and Updating a Git Commit

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Use `--amend` to update your git commit messages by adding a new file to your commit message. Use it to add files to an already committed change to your existing commit messages. For example, add style.css to your already made commit message, and the message for that commit will remain the same. Use `git commit --amend --no-edit` to add the same file to the existing commit message as you normally would like so, and use `git add` to your new commit.