Eyeql query to exclude change sets with a common change note

[Kevin Reynolds]

For example I want to find all changes that have no reviews associated with them and their commit message does not start with the following "Merge branch"

I currently use the following eyeql query to search for the change sets but it also returns any that are related to merges as well.

select revisions where modified on branch [insertBranchesHere] and (not in any review) 

I would like to add something to the effect of 
and CommitMessage != Merge%branch*  or similar 

Any help appreciated