Чистые местные филиалы git
git branch --merged master | grep -v '^[ *]*master$' | xargs git branch -d
Condemned Capybara
git branch --merged master | grep -v '^[ *]*master$' | xargs git branch -d
git checkout main
git branch -D $(git branch | grep -v 'main') # delete all local but main
git fetch # fetch from origin
git remote prune origin # delete non-existent remote branches
git pull # get to latest on main