RFE: Public (non-authenticated) API call for getting .repo file contents

[Conan-Kudo]

Feature description

I am working on implementing a plugin for the DNF package manager (the successor to Yum) for managing OBS repos (see rpm-software-management/dnf-plugins-extras#64).

However, I need a public API call (that works regardless of build service instance) that returns the generated contents of a .repo file. My understanding is that the backend is able to create this and write it out, as it does on the openSUSE Build Service, but there's no instance-agnostic way to just get the contents of said file to curl and write to disk.

Since there is a high degree of variation of where the repo content actually could be (either on port 82 of the same address, as private instances are by default, or on a separate system like openSUSE's is, or whatnot), an API means that the plugin won't be brittle and will be able to work with public and private OBS instances alike.

[Conan-Kudo]

I'd also greatly appreciate it if this was also made available in OBS 2.8 as a backport, so that relatively new private instances can leverage the plugin, too.