We have some internal changes that are not published yet as we are writing tests for them.
I talked to our developer, and I think we have found the problem.
Are you using refspecs for polling? We notice that " [poll] Last Built Revision: Revision 939a053e91a5a0b1057733393e66473896f30f6b (refs/remotes/origin/dev)" contain "refs/remotes/origin", where we would typically only expect "origin".
The new version will have a remote repository name to match against in the pretested plugin configuration, so this means you can put "refs/remotes/origin" in that field and it should work.
Right now the only work-around is change your git configuration, so it will look like this "[poll] Last Built Revision: Revision 939a053e91a5a0b1057733393e66473896f30f6b (origin/dev)".
I know the plugin is a bit shaky right now, but it was a proof-of-concept not long ago and we are still gathering issues around the corner-cases.