copr: backend: provisioning hacks to make bootstrap chroot work

roles/copr/backend/files/provision/files/mock/site-defaults.cfg

@@ -29,4 +29,5 @@ config_opts['plugin_conf']['chroot_scan_opts'] = {
     'only_failed': False,
 }
 
+# hack: dnf would install elfutils-libelf from DTS, and that would break the transaction
 config_opts['yum_install_command'] = 'install yum yum-utils shadow-utils distribution-gpg-keys elfutils-libelf'

roles/copr/backend/files/provision/provision_builder_tasks.yml

@@ -94,3 +94,7 @@
     name: dnf-makecache.service
     state: stopped
     enabled: no
+
+- name: "hack, nudge dns resolution in chroot (otherwise first attempt fails, rhbz 1710699)"
+  shell: "mock -r fedora-rawhide-x86_64 --bootstrap-chroot --init || :"
+  when: not prepare_base_image