Our repofiles do not get overwritten, according to our install docs:

http://theforeman.org/manuals/1.5/index.html#3.6Upgrade

yum upgrade http://yum.theforeman.org/releases/1.5/el6/x86_64/foreman-release.rpm
cat /etc/yum.repos.d/foreman.repo.rpmnew > /etc/yum.repos.d/foreman.repo
cat /etc/yum.repos.d/foreman-plugins.repo.rpmnew > /etc/yum.repos.d/foreman-plugins.repo

This does not work if there are old .rpmnew files from previous upgrade. Manual change/edit is necessary. We should remove the noreplace and update our manual.