git remote prune origin

最近在开发的时候偶然发现，同事在本地使用git branch -a会看到我已经删除的远程分支，git fetch之后依然能看到，然后同事就来询问我为什么不清理掉那些久远的分支，然而我确实是执行了git push origin --delete branchName删除每个版本后不用的分支。当时感觉非常奇怪，然后又发现，我在本地也能看到同事已经删除的远程分支。当时我就蒙蔽了，非常蒙蔽。后来查找资料才知道，我们需要使用git remote prune origin。

先调用git remote show origin

该命令能够获取远端分支信息，你可以看到和本地和远端不同步的地方：

$ git remote show origin
* remote origin
  Fetch URL: [email protected]
  Push  URL: [email protected]
  HEAD branch: master
  Remote branches:
    dev_chj                                      tracked
    dev_pr                                       tracked
    dev_pr_v13                                   tracked
    dev_wcc                                      tracked
    dev_wcc_city                                 tracked
    dev_xgm                                      tracked
    develop                                      tracked
    hofix_jingxiaoshang                          tracked
    hotfix_code_sort                             tracked
    hotfix_groupclueimport                       tracked
    master                                       tracked
    refs/remotes/origin/dev_cjc                  stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_agent            stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_brand            stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_channel_ad       stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_channel_youhua   stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_chonggouquanxian stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_dahuanxue        stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_deletegame       stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_getActivity_info stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_jiechufenghao    stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_kefuwaihu        stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_notice           stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_refreshtoken     stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_v10_0904         stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_v12              stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_v14              stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_v16              stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_v16_tmp          stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_v9               stale (use 'git remote prune' to remove)
    refs/remotes/origin/feature_youhua_shiro     stale (use 'git remote prune' to remove)
    refs/remotes/origin/hofix_cardno             stale (use 'git remote prune' to remove)
    refs/remotes/origin/hofix_channel_export     stale (use 'git remote prune' to remove)
    refs/remotes/origin/hofix_export             stale (use 'git remote prune' to remove)
    refs/remotes/origin/hofix_import_cardorder   stale (use 'git remote prune' to remove)
    refs/remotes/origin/hofix_master             stale (use 'git remote prune' to remove)
    refs/remotes/origin/hofix_master_sql         stale (use 'git remote prune' to remove)
    refs/remotes/origin/hofix_page               stale (use 'git remote prune' to remove)
    refs/remotes/origin/hofix_session_redis      stale (use 'git remote prune' to remove)
    refs/remotes/origin/hofix_sql                stale (use 'git remote prune' to remove)
    refs/remotes/origin/hofix_tishixiansuo       stale (use 'git remote prune' to remove)
    refs/remotes/origin/hotfix_authc             stale (use 'git remote prune' to remove)
    release                                      tracked
    test                                         tracked
  Local branches configured for 'git pull':
    dev_chj           merges with remote dev_chj
    dev_pr            merges with remote dev_pr
    dev_wcc           merges with remote dev_wcc
    dev_wcc_city      merges with remote dev_wcc_city
    dev_xgm           merges with remote dev_xgm
    develop           merges with remote develop
    feature_dahuanxue merges with remote feature_dahuanxue
    feature_v16       merges with remote feature_v16
    master            merges with remote master
    release           merges with remote release
    test              merges with remote test
  Local refs configured for 'git push':
    dev_chj      pushes to dev_chj      (local out of date)
    dev_pr       pushes to dev_pr       (up to date)
    dev_wcc      pushes to dev_wcc      (up to date)
    dev_wcc_city pushes to dev_wcc_city (up to date)
    dev_xgm      pushes to dev_xgm      (local out of date)
    develop      pushes to develop      (local out of date)
    master       pushes to master       (local out of date)
    release      pushes to release      (up to date)
    test         pushes to test         (local out of date)


* 远程 origin
  获取地址：http://openapi2.0.git
  推送地址：http://openapi2.0.git
  HEAD分支：master
  远程分支：
    beta                         已跟踪
    develop                      已跟踪
    master                       已跟踪
    refs/remotes/origin/communal 过时（使用 'git remote prune' 来移除）
    refs/remotes/origin/lt-v1    过时（使用 'git remote prune' 来移除）
    release/1.0                  已跟踪
  为 'git pull' 配置的本地分支：
    beta    与远程 beta 合并
    develop 与远程 develop 合并
    master  与远程 master 合并
  为 'git push' 配置的本地引用：
    beta    推送至 beta    (最新)
    develop 推送至 develop (本地已过时)
    master  推送至 master  (本地已过时)

过时的就是和本地不同步的分支，本地已过时的表示你需要移除这个分支了。

这个时候你需要调用

git remote prune origin

同步远程的分支到本地，这样远程已经被删除的分支，本地就不会再看见了。