This contains metadata and build scripts for the CentOS Atomic Host Development stream. See:
https://wiki.centos.org/SpecialInterestGroup/Atomic/Devel
If you're interested in scripts for the CentOS Core SIG rebuild of EL7, see the "downstream" branch.
Discuss on http://lists.centos.org/pipermail/centos-devel/ and https://lists.projectatomic.io/projectatomic-archives/atomic-devel/
First, ensure the RPM is built in Fedora, rawhide at least, and normally all stable releases. Now:
cd ~/src/distgit/fedora/ostree
rpmbuild-cwd --define 'dist .el7.centos' -bs *.spec
koji -p cbs build atomic7-el7.centos ostree-2016.7-1.el7.centos.src.rpm