Bug with git-config includeIf

Hi,

please keep me in CC when replying, I am not subscribed.

I experience the following (seemingly) bug in my git setup:

I have three files for my git configuration:

* ~/.gitconfig -> ~/config/git/gitconfig
* ~/config/git/gitconfig_private
* ~/config/git/gitconfig_work

The gitconfig_private sets my email address to this very email address, the gitconfig_work sets it to me work email address.

The gitconfig file has a `includeIf` directive:

```
[include]
    path = ~/config/git/gitconfig_private                                                                                                                                                                                                                                                                                    

[includeIf "gitdir:~/dev/work/"]
    path = ~/config/git/gitconfig_work   
```

That means, from my understanding, that all git repositories in ~/dev/work should now have the work-related email address set.

If I go to ~/dev/work/somerepo and `git config --get user.email` it indeed shows the expected email address.

But if I go to a subdirectory in that repository, the very same command shows the private email address, and commits get written with that private email address.

Did I miss something obvious or did I discover a bug?

git: 2.38.4

Best, Matthias