Looking through the logs it sometimes took several minutes for a few git clones.
Also, I'm currently looking at this build where it takes already more than four minutes to download the distribution archive (something that typically happens in less than 2 seconds).

(https://buildkite.com/dlang/dmd/builds/2922#5fca6c19-2d09-4401-8a8c-d9587ea681f1)
Did we reach a threshold in network usage and are heavily rate-throttled?