To change an old commit message, do the following:  
  
- Perform an interactive rebase using `git rebase -i [commit id]` where the commit ID is the ID of the commit that came before the one you wish to edit.  
- An editor will appear with the list of commits. Change the command next to the commit you wish to change from `pick` to `e` to edit it.  
- Git will stop on the commit you’re editing. If you run `git rebase —continue` it should give you the option to edit the commit message.  
- After you’ve edited the message on your main branch, you’ll need to rebase your dependent branches on this new branch. For example:  
```
> git checkout 12-fix-a
> git rebase main
```
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence