How to clear (delete) all merged local branches?

Question

Sometimes I have a few versions of the same features on other branches which has very similar names. How can I remove all local branches which are not on remote repo?

A little example: My local branches:

feature/authorization

feature/authorization-2

feature/authorization-with-error

Remote repo branches:

feature/authorization-2

And I want to have only local branch which is on remote repo: feature/authorization-2

Answer 1

git branch --merged

you can skip some important branches

git branch --merged| egrep -v "(^\*|master|main|dev|skip_branch_name)"