[CentOS] Check version from installer disc

Thu Oct 18 19:28:56 UTC 2018
Elliott Balsley <elliott at altsystems.com>

Is there some way to see what version will be installed by an installation
disc?  I made a USB installer and I forgot whether it's CentOS 7.3 or 7.5.
Short of running the whole installer and seeing what happens, I can't see
any way to get this info from within Anaconda.