package one package from a git repo with multiple packages

[rosea.grammostola]

Hi,

This git repo contains four packages, but I only want to package one. 
How to deal with this situation via git-buildpackage? (Upstream sources 
kept in the upstream branch and the the debian in the master branch)

https://git.tuxfamily.org/non/non.git/


Regards,

\r