• VSCode Version: 1.11.0
• OS Version: Win10

Steps to Reproduce:

1. Create very many trackable changes in git.
2. Press 'Discard All Changes' action in the viewlet.
   -> Git: spawn ENAMETOOLONG (see screenshot below)
   Expectation: undo for all works with no errors, or user-friendly message presented what went wrong.

git checkout . works fine in the terminal though