Feature request: clean the repository where the action runs

[Finesse]

The problem: when this action is used, the repository gets a pile of commits on the lock branch, which adds much noise to the commit history, makes it untidy.

Solutions:

• Add an option to remove the repository branch when the queue is empty
• Alternatively, force-push to the lock branch so that it has at most 1 commit, like the https://github.com/JamesIves/github-pages-deploy-action action with a single-commit: true option does

[hwhsu1231]

Totally agree! I need this feature as well.