[Yum] Update only selected package

[Marcin Zajączkowski]

Hi,

I need to keep up-to-date one package from some repository. This 
repository has some other packages, but I want to ignore their newer 
versions. I've found "exclude" option, but I don't want to have to type 
all package names from repository to exclude. I tried with regex, but
exclude=^package-name
and similar didn't work.

Probably I make some mistake in regex, but does yum allow to use 
negation in exclude param?

Thanks for help
Marcin