Comment # 4 on bug 1175587 from Ralf Habacker

(In reply to Ralf Habacker from comment #3)
> After https://github.com/openSUSE/obs-build/pull/923 has been submitted and
> an updated build package has been released, packagers can debug dependency
> generator support locally by adding an additional command line options as:
> 
>     osc build --build-opt="--recipe-opt=--rpmfcdebug" openSUSE_Leap_15.4

This pull request has been merged with a slightly different command line option
with the next release of the 'build' package. 

osc build --build-opt="--buildtool-opt=--rpmfcdebug" openSUSE_Leap_15.4