git dependencies intermittently fail to restore

[joprice]

Description

When using a git dependency in a multi-project solution such as

git https://github.com/joprice/Fun.Build.git 5f82a6aeee1efe807c06d12fd70ddd75c631041b build: "dotnet pack -p:PackageVersion=1.1.6-beta-000", Packages: Fun.Build/obj/Release/

source paket-files/github.com/joprice/Fun.Build/Fun.Build/bin/Release

nuget Fun.Build 1.1.6-beta-000

git dependencies fail intermittently when restoring the solution with an error like

Fetching the git cache at /root/.paket/git/db/Fun.Build failed.
Message: Could not run "git remote set-url origin "https://github.com/joprice/Fun.Build.git"".

I attempted to disable parallelism with dotnet restore --disable-parallel test.sln, assuming that the issue is multiple projects creating the cache directories simultaneously, but it still fails some of the time. This is especially noticeable in CI, since the cache directory is not present, triggering this cache checkout code path.