According to the wiki page (
https://wiki.jenkins-ci.org/display/JENKINS/Gitorious+Plugin), the Gitorious plugin depends on git plugin version 1.1.24 and on Jenkins 1.466. The git plugin you have installed is probably the next generation of git plugin, version 2.3.xx, or version 2.2.xx. The last release of git plugin 1.xx appears to have been about 18 months ago. Jenkins 1.466 was released over 30 months ago.
As far as I can tell, git plugin 2.xx does not include a doNotifyCommit(String, String) method. It does include a doNotifyCommit(String, String, String) method.
I don't think the Gitorious plugin is usable with git plugin 2.xx
Mark Waite