How to delete all remote git branches which have already been integrated?

Question

At work we are using topic branches which are integrated into a few (3) master branches at some point. Now I\'d like to delete all topic branches from my remote reposit

Answer 1

Just for Powershell and windows users.

    git branch -r --merged  | findstr /v "origin/master" | %{git push origin --delete $_.Trim().Substring(7)}