Repo left in dirty state when checkout fails

[jcansdale]

• GitHub Extension for Visual Studio version: 2.5.1
• Visual Studio version: 2015

1. Clicked on checkout link

2. Checkout failed
   

3. Repo left in dirty state
   

4. Can't checkout
   

5. Tried git clean -fd but it failed

6. Exited VS and the following finally cleaned up my repo

git clean -fd
git reset --hard

Pretty painful. I wonder if we could detect this and give the user some hints?