I'm wondering how much load this is sending to github. Github has a ton of golang packages, including many non-popular ones that wouldn't otherwise get much traffic. A refresh job running full clones many times a day must be burning up bandwidth and compute over there as well. I suppose it's a drop in the bucket for Github's usage, but it's got to be a huge number.
I wouldn't be surprised if half the value of the Microsoft acquisition was to get GitHub's infra closer to the super-scale pipes and peering that Azure/Office/Update/etc leverage. I would expect they probably run tens to hundreds of PBs per month.
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