fetch rdoinfo fails, could not resolve github.com

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unable to access 'https://github.com/redhat-openstack/rdoinfo

http://logs.openstack.org/24/517324/1/gate/legacy-tripleo-ci-centos-7-containers-multinode/56dce04/job-output.txt.gz#_2017-11-04_18_32_54_407907

total hits: 3
build_branch
  100% master
build_change
  33% 499680
  33% 509392
  33% 517615
build_name
  33% legacy-tripleo-ci-centos-7-containers-multinode-upgrades
  33% legacy-tripleo-ci-centos-7-scenario003-multinode-oooq-container-upgrades
  33% legacy-tripleo-ci-centos-7-scenario004-multinode-oooq-container
build_node
  100% centos-7
build_queue
  100% check
build_status
  100% FAILURE
build_zuul_url
  100% N/A
filename
  100% job-output.txt
log_url
  33% http://logs.openstack.org/15/517615/1/check/legacy-tripleo-ci-centos-7-scenario004-multinode-oooq-container/03301af/job-output.txt
  33% http://logs.openstack.org/80/499680/3/check/legacy-tripleo-ci-centos-7-containers-multinode-upgrades/b77cd37/job-output.txt
  33% http://logs.openstack.org/92/509392/7/check/legacy-tripleo-ci-centos-7-scenario003-multinode-oooq-container-upgrades/0821dd6/job-output.txt
node_provider
  66% rax-dfw
  33% inap-mtl01
port
  33% 39715
  33% 48234
  33% 53312
project
  33% openstack/puppet-tripleo
  33% openstack/tripleo-heat-templates
  33% openstack/tripleo-quickstart-extras
tags
  100% job-output.txt console console.html
voting
  66% 0
  33% 1