Git means never having to say you're sorry

In Git, it's never too late to go back and do things differently

You can't screw anything up irrevocably

The old commits are still in there

You can move the tag back to the old head if you change your mind

Or:

You can redo new work in a slightly different universe

You can undo a bad change in the middle of some good changes

You can see what things would be like if work were done in a different order

You can copy work from one branch to a different branch

Once you are happy with how things went, you can publish your history

If you change your mind later, you can publish a different history