Delete unused git branches

git_prune_branches

→ git remote prune origin
→ git branch --merged | grep -v "\*" | xargs -n 1 git branch -d

# Remember to do this from the master branch
# If you run it from a feature branch the master branch gets deleted.
→ git branch --merged | grep -v "\*" | xargs -n 1 git branch -d
Deleted branch master (was 644eb76).

You can recheckout master branch
→ git checkout -b master origin/master