git delete branches not on origin code example

Example 1: delete local branches not on remote

git branch -vv | grep ': gone]'|  grep -v "\*" | awk '{ print $1; }' | xargs -r git branch -D

Example 2: git delete local branches not on remote

git fetch -p && for branch in $(git branch -vv | grep ': gone]' | awk '{print $1}'); do git branch -D $branch; done