Git：如何列出正在跟踪不再存在的远程分支的本地分支？

如何列出出现的任何本地分支（按照 .git / config ）要跟踪不再存在的远程分支？在这种情况下，远程分支机构在GitHub上，但我怀疑它们的位置没有关系。

How can I list any local branches that appear (as per .git/config) to be tracking remote branches that no longer exist? Remote branches are on GitHub in this case but I suspect their location has no relevance.

例如：

For example:

1. 我有本地分行， a ， b ， c 和 d 。


2. a code> origin / a 和 c 正在追踪 origin / c 。


3. b 和 d 不会跟踪远程分支。 b $ b
4. origin / a 已被合并回master，并在清理资料库时被删除;我不再需要保留本地分行 a 。


5. 如果本地分行 a 检出到工作树，运行 git fetch 或 git pull 导致错误您的配置指定从远程合并ref'a'，但不会提取这样的ref。

1. I have local branches, a, b, c and d.
2. a is tracking origin/a and c is tracking origin/c.
3. b and d are not tracking remote branches.
4. origin/a has been been merged back into master and was deleted during a repository clean-up; I no longer need to keep local branch a.
5. If local branch a is checked out to the working tree, running git fetch or git pull results in the error Your configuration specifies to merge with the ref 'a' from the remote, but no such ref was fetched.

我如何生成仅包含 a 以及任何其他似乎正在跟踪不再存在的远程分支的本地分支？

How would I produce the list containing only a and any other local branches that appear to be tracking remote branches that no longer exist?

我想识别这些，以便我可以删除不再需要的过时本地分行。

I would like to identify these so that I can delete obsolete local branches I no longer need.

列表不应包含本地分行 b 或 d 不跟踪远程分支，也不是 c 正在跟踪 origin / c ，它仍然存在。

The list should not include local branches b or d that are not tracking remote branches, and also not c that is tracking origin/c, which still exists.