Hello.
mgarepo version 1.9.11 adds maintdb command :
$ mgarepo maintdb --help
Usage:
Take maintainership of one package :
mgarepo maintdb set [package] [login]
Remove yourself from maintainer of a package :
mgarepo maintdb set [package] nobody
See who is maintainer of a package :
mgarepo maintdb get [package]
See the list of all packages with their maintainer :
mgarepo maintdb get