Git删除在本地有但在远程库中已经不存在的分支

$ git remote show origin
* remote origin
lib               stale (use 'git remote prune' to remove)
lib2019       stale (use 'git remote prune' to remove)

使用如下命令可以删除没有用的分支

$ git remote prune origin 
Pruning origin
URL: [email protected]
 * [pruned] origin/lib
 * [pruned] origin/lib2019