远程git仓库版本检测失败

是 git 的问题，你可以根据以下日志排查：

首先是命令 git fetch origin 报错：

fatal: bad object refs/remotes/origin/main

error: github.com:nightlye/supermemo-backup.git did not send all necessary objects

然后是命令 git log remotes/origin/main --pretty=format:"%ai" -1 报错：

warning: ignoring broken ref refs/remotes/origin/main

warning: ignoring broken ref refs/remotes/origin/main

fatal: ambiguous argument 'remotes/origin/main': unknown revision or path not in the working tree.

Use '--' to separate paths from revisions, like this:

'git <command> [<revision>...] -- [<file>...]'

git 就是太精细了，很容易出各种各样的问题，我也没有遇到过，你只能自己折腾了。