Sign Git tag with Maven release plugin?

Staring from version 2.9.0 git supports tag.forceSignAnnotated config option, which will force git to sign tags as maven uses annotated tags when releasing. Just put

[tag]
    forceSignAnnotated = true

into your .gitconfig file.

Unfortunately this seemed to be currently not available.

https://issues.apache.org/jira/browse/SCM-486

But this does not mean it might not be possible somehow?