If the ``revision`` param is passed in that is 40 chars in length, then treeherder won't find the revision. Investigate whether we always do and should store revisions at 12. If someone searches by a 40 char revision, we should be able to find it if we only stored 12 chars. However, if the API always truncates the value to 12, but we SOMETIMES store the revision as 40 chars, then we will not be able to find any resultsets with revision longer than 12 chars.