使用git 1.6.4.2时，当我尝试git pull时，会出现以下错误：
error: unable to resolve reference refs/remotes/origin/LT558-optimize-sql: No such file or directory
From git+ssh://remoteserver/~/misk5
! [new branch] LT558-optimize-sql -> origin/LT558-optimize-sql (unable to update local ref)
error: unable to resolve reference refs/remotes/origin/split-css: No such file or directory
! [new branch] split-css -> origin/split-css (unable to update local ref)
我尝试过git远程梅干起源，但没用。
当前回答
尝试使用以下方法清理本地存储库：
$ git gc --prune=now
$ git remote prune origin
man git gc（1）：
git-gc - Cleanup unnecessary files and optimize the local repository
git gc [--aggressive] [--auto] [--quiet] [--prune=<date> | --no-prune]
Runs a number of housekeeping tasks within the current repository, such as compressing file revisions
(to reduce disk space and increase performance) and removing unreachable objects which may have been
created from prior invocations of git add.
Users are encouraged to run this task on a regular basis within each repository to maintain good disk
space utilization and good operating performance.
man git远程（1）：
git-remote - manage set of tracked repositories
git remote prune [-n | --dry-run] <name>
Deletes all stale remote-tracking branches under <name>. These stale branches have already been
removed from the remote repository referenced by <name>, but are still locally available in
"remotes/<name>".
其他回答
git fetch--prune为我修复了这个错误：
[marc.zych@marc-desktop] - [~/code/driving] - [Wed May 10, 02:58:25]
[I]> git fetch
error: cannot lock ref 'refs/remotes/origin/user/janek/integration/20170505': 'refs/remotes/origin/user/janek/integration' exists; cannot create 'refs/remotes/origin/user/janek/integration/20170505'
From github.com:zooxco/driving
! [new branch] user/janek/integration/20170505 -> origin/user/janek/integration/20170505 (unable to update local ref)
From github.com:zooxco/driving
[marc.zych@marc-desktop] - [~/code/driving] - [Wed May 10, 02:58:30]
[I]> git fetch --prune
- [deleted] (none) -> origin/user/janek/integration
不过，这假设有问题的分支已在远程删除。
您也可以将其添加到~/.gitconfig中，以在运行git fetch时自动修剪：
[fetch]
prune = true
对我来说，我是这样解决的：
rm .git/refs/remotes/origin/master
git fetch
之后，我从github收到了这条消息。
没有当前分支的跟踪信息
所以接下来我做的是：
git branch --set-upstream-to=origin/master master
git pull
从项目中手动删除特定分支的文件
.git/refs/remotes/origin/master
git gc --prune=now
git pull
我只是想补充一下Git引用损坏的可能原因之一。
可能的根本原因
在我的系统（Windows 7 64位）上，当BSOD发生时，一些存储的参考文件（最有可能是BSOD发生后当前打开/写入的）会被NULL字符（ASCII 0）覆盖。
正如其他人提到的，要修复它，只需删除那些无效的引用文件并重新获取或重新提取存储库就足够了。
实例
错误消息：
无法锁定引用“refs/remotes/origin/some/branch”：无法解析引用“refs/remotes/origin/some/bbranch”：引用已断开
解决方案：
删除存储在文件%repo_root%/.git/refs/remotes/origin/some/branch中的引用refs/remotes/corigin/sme/branch。
我在作曲家更新方面也遇到了同样的问题。但对我来说，只有在我清除了composer缓存并删除了供应商文件夹的内容后，它才起作用：
rm -rf vendor/*
git gc --prune=now
git pull
composer clear-cache
composer update my/package
