This is the custom version of NuGet used by OctoPack.
The primary customization is to preserve version strings as "what you see is what you get" for both the filename and metadata.
This is a fork of NuGet 3 available here: https://github.com/OctopusDeploy/NuGet.Client
The build is available here: https://build.octopushq.com/project.html?projectId=OctopusDeploy_NuGet&tab=projectOverview
The packages are available here: https://octopus.myget.org/feed/octopus-dependencies/package/nuget/NuGet.CommandLine