yum-debug-dump is a program which creates a gzipped file containing a lot of information useful to developers trying to debug a problem.
By default it will output a file to the current working directory named yum_debug_dump.txt.gz. This file contains no private information but does contain a complete list of all packages you have installed, all packages available in any repository, important configuration and system information. You can view this file using the 'zless' command.
/etc/yum.conf /etc/yum/repos.d/ /var/cache/yum/
yum.conf (5) http://yum.baseurl.org/
See the Authors file included with this program.