On Wednesday, September 1, 2010, 9:35:16 AM, I wrote:
On July 7th, 2009, Mark Salter made a post "crossbuilding
rpms with
koji" on the fedora-buildsys-list".
http://www.mail-archive.com/fedora-buildsys-list@redhat.com/msg02148.html
And for folks who prefer the official archive,
http://www.redhat.com/archives/fedora-buildsys-list/2009-July/msg00000.html