Answer by attolee for git rebase: "error: cannot stat 'file': Permission denied"

Using SourceTree in Win 10, fixed the problem by closing Atom editor.

Error reproduce:

1. In branch B, create a md file, using Atom edit it, save and commit.
2. Switch to branch A, pull down new commits from server.
3. Try Switch back, Opps, it says “error: cannot stat 'file': Permission denied”.