Comment # 1 on bug 1153687 from Michael Andres

What's wrong with it?

> root@fibonacci:~ (3) $ zypper ar obs://some:where/ xxx
> Guessed: platform = openSUSE_Leap_$releasever
> ...
> https://download.opensuse.org/repositories/some:/where/openSUSE_Leap_15.1

The 'Guessed platform' depends on your installed product. If the projects has
no repo set up for it, you need to manually pass one that fits for you:

> [man zypper]
> These URIs have the form of obs://project/[platform], where project is the 
> name of the OBS project and platform is the target platform (OS) for which 
> the repository is intended.
> 
> If platform is omitted, openSUSE_$releasever is used unless a value for 
> obs.platform is defined in zypper.conf. ...
Ok, the man page should state that it's actually guessed based on your product
(/etc/proucts.d/baseproduct).. I'll fix that.