Is it possible to confirm new files or changed files into the Master?
It looks like the the only option is to reject the changes and override the nodes trying to submit them. It would be nice to be able to review and accept or reject those changes on a file by file basis. Right now the only semi-workaround I could think of was to temporarily turn off Master to accept the changes then turn it back on again.
Alternately, it would be nice to be able to optionally pull NEW files into the master but disallow edits to existing files.