It would be nice to have if this Maven plugin had a -D user system property to skip its execution...

I realize that you can use the following in a POM, but can't see how to do this from CLI w.o. changing code:

<configuration>
  <skip>true</skip>
</configuration>

As far as I understand Maven, support for being able to do something like mvn -Dmaven.gitcommitid.skip=true package would have to be coded into the Mojo (although I may be wrong).

FYI: The *.skip suffix naming convention seems to be what all of the core Maven plugins use; e.g. maven.javadoc.ski, maven.source.skip etc. or also checkstyle.skip, findbugs.skip, pmd.skip, cpd.skip, etc.