Clean Branches - HollyPony/git-documentation GitHub Wiki
Commands are UNIX only, do not try this with Microsoft system
List local merged branches excluding master && develop
git branch --merged | egrep -v "(^\*|master|develop)"
Remove local merged branches
git branch --merged | grep -v master | xargs git branch -d
Remove remote merged branches
git branch -r --merged remotes/origin/master | grep -v master | sed 's/origin\///' | xargs -n 1 git push --delete origin