While deving at a Microsoft Open Hack my group discovered this useful piece of information in this issue comment: https://github.com/helm/helm/issues/1796#issuecomment-311385728

We found it very useful for our Blue Green CD pipeline and thought others might find it useful as well.
Signed-off-by: Ethan Arrowood <ethan.arrowood@gmail.com>
Signed-off-by: Matthew Fisher <matt.fisher@microsoft.com>