[python-committers] How to force Travis to re-run?

[Eric V. Smith]

I'm trying to merge this: https://github.com/python/cpython/pull/5113

Travis failed, but not due to something in this PR (looks like a random 
networking failure). How do I trigger the Travis check to re-run? Or I 
guess just skipping it would be okay as a last resort, but I'd really 
like to try re-running it first.

Thanks.
Eric.