It’s worth linking to WHP155 “File-based Production: Making It Work In Practice”, which goes into quite a bit more detail about how Ingex is used and interoperability with other parts of the chain (e.g., Avid)
In theory, this should be updated within an hour of changes being committed. That said, I’ve never done a CVS⟷git bridge before (only Subversion and Mercurial), so it’s entirely possible it will all go horribly wrong!