Having the script and the module named the same was just causing too
many weird python issues, so I gave up.

This cleans up from moving a chunk of the build function into it's own
koji init function.  It also adds a function to deal with uploading
content to koji.

I wanted to move the koji initialization out of the build command as we
could use it in different functions.

This borrows some from /usr/bin/koji but does it in a way that allows
for clients to handle watching the task if they want or not.  As
/usr/bin/koji gets moved more toward a koji client library some of this
code can go away.

Currently this doesn't actually do anything, but the workings are there.
Also make the git repo a object property.