when does redhat update there online repository.

im not sure if i know how to construct this question or maybe i do not fully understand the process but there is something that i need to know in regards to syncing my local server with red hat repos.

i have a local server which i use reposync to sync offical redhat repos to my server.
is there a specific time when redhat sync there repository?
meaning is there a situation where i pull all available updates from the offical redhat site but redhat did not fully updates all packages and i can cause some issues with my local copy of redhat repo?