SHELL

git delete all remote branches except master

git branch -r | grep 'origin' | grep -v 'master$' | grep -v HEAD | cut -d/ -f2- | while read line; do git push origin :heads/$line; done;

Remove All Local Branches not on Remote

$ git branch -r | egrep -v -f /dev/fd/0  <(git branch -vv | grep origin) | xargs git branch -d

remove all local branches deleted on remote

# Shorthand for deleting localy all branches already deleted on remote
# set this alias in git.config
git config --global alias.gone "! git fetch -p && git for-each-ref --format '%(refname:short) %(upstream:track)' | awk '$2 == "[gone]" {print $1}' | xargs -r git branch -D"
# then run
git gone