Benchmark CI is having trouble pulling from Github

[joyeecheung]

From nodejs/node#45828, example:

https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1263/console

19:28:03 ++ git clone http://github.com/nodejs/node.git
19:28:03 Cloning into 'node'...
19:32:45 error: RPC failed; curl 56 GnuTLS recv error (-54): Error in the pull function.
19:32:45 fatal: The remote end hung up unexpectedly
19:32:45 fatal: early EOF
19:32:45 fatal: index-pack failed
19:32:46 Build step 'Execute shell' marked build as failure

I also noticed that it still does

19:32:50 Sending e-mails to: gareth@gsellis.com refack@gmail.com

Should we update the contact in the script?

[UlisesGascon]

I think maybe we can do a patch with postBuffer in the Git config. Regarding notifications, what will be the approach update the emails or maybe sending a notification to a channel in Slack? 🤔

[mhdawson]

In terms of the email I'm not sure those work anyway. Figuring out we handle notifications/getting it fixed does make sense.

[richardlau]

We're seeing similar issues on the other benchmark machine with the V8 CI job: #3050
We tried upgrading the other machine to Ubuntu 18.04, unfortunately the issue is still occuring (We should still upgrade this machine from Ubuntu 16.04).