forcing builder arch for noarch packages

[Thomas Sailer]

Hi,

is there a way to force the builder arch for building a noarch package?

mingw32-tcl builds first tclsh85.exe, and then tries to use this shell
plus some tcl scripts in the build process. This works in mock if I
BuildRequire wine.

However, on koji, noarch packages tend to be built on PPC builders where
there is no wine package, and therefore package building fails.

Tom