error MSB4018: The "Microsoft.Build.Tasks.Git.LocateRepository" task failed unexpectedly.

[mattkoch614]

Describe the bug
After cloning this project locally, when building the Microsoft.Health.Fhir.Web project on a Mac using Visual Studio 2019 preview, I receive the following error:

error MSB4018: The "Microsoft.Build.Tasks.Git.LocateRepository" task failed unexpectedly.

To Reproduce
Steps to reproduce the behavior:

1. Clone Repo
2. Build
3. Error occurs

Expected behavior
No build errors occur.

Actual behavior
A build error occurs.

I'm not exactly sure what this error refers to.

[brendankowitz]

This is caused by the Microsoft.SourceLink.GitHub package, there are references to an open issue around: dotnet/sourcelink#155