Using pkg updating without /usr/ports

[Miroslav Lachman]

Hi,
I am using own poudriere repo to build needed packages for our server. I 
was used to `pkg_updating` or `pkg updating` in the past (when I was 
compiling ports on each server).
I don't have /usr/ports on server anymore. So the `pkg updating` command 
doesn't work. (There is no /usr/ports/UPDATING file)
Is there any standard way to use it without ports tree, just with my own 
poudriere repo?

Miroslav Lachman