...
build/
yum_data/
README.md
myrepos/ # also up here
SIMP4.2_Centos6.6_x86_64/
myrepos/ # optional, not checked in, but if it exists repos will be used
repos/
packages.yaml
---
'exact-package-name-for-this-exact-release-1.0.1-1.rpm'':
source: 'http://the.last.place/yum-downloader/sourced-me.from'
...