Description

So the idea is to be able to undo a bump + changelog just made or commit.

This can be either a command or just documentation (doesn't need to be part of the code).
For example, in my use case I usually forget to add --changelog or sometimes I forgot something.

This command is intended for local usage. Specially if you manually execute cz bump --changelog

Possible Solution

The code to revert a bump for example is:

for a bump:

git tag --delete <created_tag>
git reset HEAD~
git reset --hard HEAD  # or git checkout -f

for a commit:

git reset HEAD~

Additional context

In case we go for a command I see something like this:

cz undo --bump
cz undo --commit

I'd avoid revert because it has a different meaning in git. Which is adding a new commit reverting the previous one.

Opinions? Thoughts?