build: bring in additional tooling to enable building RHCOS
The `coreos-assembler` container is becoming an entry point for
building many pieces of RHCOS.  We can continue to extend its
functionality by bringing in tools necessary to run the RDGO portion
of the build.
@@ -43,4 +43,12 @@ rm mantle -rf
dnf remove -y cargo golang
rpm -q grubby && dnf remove -y grubby
+
+# more tooling for building openshift/os in the container
+cd /root
+git clone https://github.com/openshift/os
+cp os/RPM-GPG-KEY* /etc/pki/rpm-gpg/
+rm os -rf
+dnf copr -y enable walters/buildtools-fedora
+dnf -y install dnf-plugins-core fedpkg openssh-clients rpmdistro-gitoverlay
yum clean all
