github branch delete pattern

grep -v master // master 제외

<!-- local branch 삭제 패턴 -->
```bash
git branch | grep "" | grep -v master | xargs git branch -D
```

<!-- remote branch 삭제 패턴 -->
```bash

```
```bash
git branch -r | grep -Eo 'greenkeeper/.*' | xargs -I {} git push origin :{} 

```