General :: Change Management Ticketing Systems?

Can anyone suggest a product that will allow a developer to raise a ticket (or similar sort of trackable item) which can be used to track the progress of a software build through a number of environments?Basically It's just a case of creating a ticket, using that to trigger a software build, then requiring some form of sign off to allow a second stage, and then another sign off for a third. It's not about building things, just tracking an issue through various stages of testing through to production.

I'm looking at replacing an environment which currently uses jira for this purpose, but I've no knowledge of it, and am keen on other GPL tools instead. Jira is, as a product, massively overkill for what is required too. So I'm keen on one which might fit in with the rest of my toolset - cobbler, func, puppet etc. I was looking at trac, which seems like it might have some relevant angles to it, but I really can't tell because having not done this sort of project before I don't honestly know what to call what i'm after. I don't *think* that something like bugzilla would be appropriate as it's too specifically about bug tracking, rather than a generic workflow with signoff stages and such.