bots: Use atomic host to get check ref.
bots: Use atomic host to get check ref.

The fedora-25 image treefile has bad info in it. This
should be more accurate going forward.

Reviewed-by: Dominik Perpeet <f7830b2723a5db4fc185058b06cfab4b89a38da9@redhat.com>

harishanand95/cockpit,mvollmer/cockpit,petervo/cockpit,mareklibra/cockpit,garrett/cockpit,michalskrivanek/cockpit,Scribery/cockpit,larskarlitski/cockpit,cockpituous/cockpit,larsu/cockpit,petervo/cockpit,larskarlitski/cockpit,larskarlitski/cockpit,deryni/cockpit,larsu/cockpit,Scribery/cockpit,moraleslazaro/cockpit,mareklibra/cockpit,cockpituous/cockpit,cockpit-project/cockpit,petervo/cockpit,SotolitoLabs/cockpit,Scribery/cockpit,larskarlitski/cockpit,garrett/cockpit,michalskrivanek/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,andreasn/cockpit,cockpituous/cockpit,SotolitoLabs/cockpit,larsu/cockpit,harishanand95/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,mvollmer/cockpit,andreasn/cockpit,michalskrivanek/cockpit,moraleslazaro/cockpit,harishanand95/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,Scribery/cockpit,michalskrivanek/cockpit,andreasn/cockpit,martinpitt/cockpit,andreasn/cockpit,mareklibra/cockpit,SotolitoLabs/cockpit,cockpituous/cockpit,mareklibra/cockpit,petervo/cockpit,SotolitoLabs/cockpit,mvollmer/cockpit,harishanand95/cockpit,mareklibra/cockpit,deryni/cockpit,andreasn/cockpit,martinpitt/cockpit,petervo/cockpit,deryni/cockpit,garrett/cockpit,michalskrivanek/cockpit,martinpitt/cockpit,SotolitoLabs/cockpit,cockpituous/cockpit,larsu/cockpit,deryni/cockpit,Scribery/cockpit,cockpituous/cockpit,stefwalter/cockpit,deryni/cockpit,stefwalter/cockpit,petervo/cockpit,andreasn/cockpit,Scribery/cockpit,harishanand95/cockpit,andreasn/cockpit,garrett/cockpit,petervo/cockpit,deryni/cockpit,harishanand95/cockpit,stefwalter/cockpit,Scribery/cockpit,larsu/cockpit,larskarlitski/cockpit,larskarlitski/cockpit,stefwalter/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,harishanand95/cockpit,mareklibra/cockpit,martinpitt/cockpit,mvollmer/cockpit,stefwalter/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,michalskrivanek/cockpit,martinpitt/cockpit,michalskrivanek/cockpit,mareklibra/cockpit,moraleslazaro/cockpit,larskarlitski/cockpit,larsu/cockpit,cockpit-project/cockpit,deryni/cockpit,garrett/cockpit