How to restrict access to view node revisions with Organic Groups Does organic groups restrict access to node revisions as well as the nodes themselves?

I have a node page with a view of the revisions output in a block in the sidebar. OG restricts access to the node itself if the user doesn't belong to that node's group however they can see the revisions in the block.

I have tried creating my own OG permission but the organic groups permissions aren't usable in the view restriction. Not sure what else to try?
Rather than worrying about access to the revisions themselves, you might be able to add relationship to the node itself and then a filter to check it the node is accessible.

I imagine there's a better way to do it, but this might work in the mean time.