Path to actual project files

Hey everyone,

I just installed Gitlab with the Omnibus package for Ubuntu and created my first project.
I’m wondering where the actual project files are saved.
The docs say the default repository path is in /var/opt/gitlab/git-data, and I indeed see the git repo there (config, description, HEAD, hooks, etc.), but not the project files itself.
I even searched for my index.php on the whole server using find / -name "index.php", but it doesn’t find the file.

So where are the files saved?