Kohsuke pointed out the root cause of my problem:
Jenkow is a multi-module Maven project.
The plugin project is just a sub-module.
Only the main POM had the correct SCM element, but not the plugin sub-module.
After adding the correct SCM element to the plugin sub-module, the Wiki macro
shows
For my plugin, the Wiki page shows the wrong SCM.
https://wiki.jenkins-ci.org/display/JENKINS/Jenkow+Plugin
The source is on Github and the POM clearly says git:
https://github.com/jenkinsci/jenkow-plugin/blob/master/pom.xml#L70
But the Plugin Information is shown as Subversion.
How can I fix
