I then installed speedtest-cli to the VPS using apt and tested the connection speed with the following results:
Download: 1999.57 Mbit/s Upload: 588.90 Mbit/s
When downloading from GitHub I noticed they're using an S3 bucket to store the release archive:
github-production-release-asset-2e65be.s3.amazonaws.com
Could S3 reduced redundancy be the culprit here? Is there some way I can increase the speed of these downloads?