Anyone using git with gitflow may have faced this problem: many branches are not removed when feature or hotfix is done (especially when you merge manually and don’t use git flow feature finish).
Firtunately, there is an easy way to remove all branch in same namespace like feature/, hotfix/
git branch | awk -F. '/feature/{print $1}'| xargs -I {} git branch -D {}
or you can write it as a git alias and use stdin to assign the namespace, in your .git/config:
[alias]
mdb = "!f() { if [ -z $1 ]; then echo 'Please assign branch namespace.'; else git branch | awk -F. '/'"$1"'/{print}' | xargs -I {} git branch -D {}; fi }; f"
Then use it
$ git mdb feature