Customizable URL template

[simonsmh]

The official gitlab have a short dash link in the middle of the project name and the file path like this /-/:
https://gitlab.com/<user>/<project>/-/blob/<branch>/<filepath>/filename
But the self hosted GitLab doesn't have this behavior like this.
https://<self.gitlab.endpoint>/<user>/<project>/blob/<branch>/<filepath>/filename
How to disable this behavior?

https://github.com/sourcegraph/zoekt/blob/dc1b23bb0da9a0fa91056ad6d5fcf9b8e641f67d/gitindex/index.go#L146-L151

It would be nice if users can customize the git index URL templates.

[simonsmh]

Here's the affected links for reference.