This is an exert from Paul Whalen's http://paulfedora.wordpress.com/2010/04/12/koji-hub-configuration/

It was agreed that all parts of our Koji build system would reside on Hong Kong. After successfully installing and configuring Postgresql the next step is the Koji Hub. In order for the Koji Hub to work Apache should be installed as well as a few additional modules. Run the following command as root: