diff --git a/src/git.coffee b/src/git.coffee
index f445a0caf..db5a62ce2 100644
--- a/src/git.coffee
+++ b/src/git.coffee
@@ -7,7 +7,8 @@ GitUtils = require 'git-utils'
 # Public: Represents the underlying git operations performed by Atom.
 #
 # This class shouldn't be instantiated directly but instead by accessing the
-# `atom.project` global and calling `getRepo()`.
+# `atom.project` global and calling `getRepo()`. Note that this will only be
+# available when the project is backed by a Git repository.
 #
 # ## Example
 #