When I experimented with it, it seemed that the git parameter plugin requires the field "Branch" be an exact branch name (like origin/master) rather than a wildcard match. The help for that field does not mention support of wildcard matches (nor does it say that wildcard matches are not supported).
Based on that image, I assume you're trying to show all the revisions in the branch */develop_test as choices in the pick list. Your users will then choose a specific revision parameter based on SHA1, author name, and time of the commit. Is that a correct assumption? If so, can you explain your use case? I'm curious how users will select specific commits rather than branch names or tag names.
I've attached a picture of the pick list (with revisions) generated for one of my repositories.
Mark Waite