Yum: How can I view variables like $releasever, $basearch & $YUM0?

I am setting up a yum repository, and need to debug some of the URLs in the yum.conf file. I need to know why is Scientific Linux trying to grab this URL, when I was expecting it to grab another URL: # yum install package http://192.168.1.100/pub/scientific/6.1/x86_64/repodata/repomd.xml : [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404" Trying other mirror. Error: Cannot retrieve repository metadata (repomd.xml) for repository: sl. Please verify its path and try again The yum.conf(5) manpage gives some information about these variables: > Variables > > There are a number of variables you can use to ease maintenance of > yum's configuration files. They are available in the values of several > options including name, baseurl and commands. > > $releasever This will be replaced with the value of the version of the > package listed in distroverpkg. This defaults to the version of > 'redhat-release' package. > > $arch This will be replaced with your > architecture as listed by os.uname() in Python. > > $basearch This will be replaced with your base architecture in yum. > For example, if your $arch is i686 your $basearch will be i386. > > $YUM0-$YUM9 These will be replaced with the value of the shell > environment variable of the same name. If the shell environment > variable does not exist then the configuration file variable will not > be replaced. Is there a way to view these variables by using the yum commandline utility? I would prefer to not hunt down the version of the 'redhat-release' package, or manually get the value of os.uname() in Python.