Windows agents sometimes fail to git clone a repo

[giordano]

We often see Windows jobs that fail during initial git clone with an error like https://buildkite.com/julialang/julia-master/builds/43425#019431d9-4a3e-4072-abc5-69a761acfb7b

> git clone -v --dissociate --reference C:\\cache\\repos\\https---github-com-JuliaLang-julia-git -- https://github.com/JuliaLang/julia.git .
Cloning into '.'...
POST git-upload-pack (174 bytes)
POST git-upload-pack (gzip 4818 to 2485 bytes)
POST git-upload-pack (gzip 5868 to 3003 bytes)
POST git-upload-pack (gzip 8318 to 4241 bytes)
POST git-upload-pack (gzip 12968 to 6569 bytes)
POST git-upload-pack (gzip 22277 to 11231 bytes)
error: failed to close rev-list's stdin: Invalid argument
fatal: remote did not send all necessary objects

I also noticed that sometimes for a few second there are two agents with the same name:

One of these two agents was running the failed job linked above. Perhaps this failure to clone the git repo is due to the temporary clash between the two agents trying to start a new job at the same time?

I couldn't find this issue reported anywhere, nor here nor in Julia repo, despite the fact this issue has been going on for several months (probably well over one year).