Packstack isn't even in those repos, which means that folks can't use packstack to install nightly builds easily.
This is something the CI team discussed last Monday. SmokeStack ought to pack Packstack along the rest of the components. Testing it may be out of scope, but at least it should generate the PackStack RPM. It'd avoid the problem you just described so people could test the very latest version of all the packages with ease.
It's a work item for this week, so we should get it sorted out within the next few days.