git prune local branch

gistfile1.txt

(unix-like) 
git branch -r | awk '{print $1}' | egrep -v -f /dev/fd/0 <(git branch -vv | grep origin) | awk '{print $1}' | xargs git branch -d

(linux)
git branch --merged | egrep -v "(^\*|master|main|dev)" | xargs git branch -d

(windows) 
git branch --merged | Select-String -Pattern "develop" -NotMatch | ForEach-Object {git push origin --delete "$_".Trim(); git branch -d "$_".Trim()}