Don't use the clone_depth:1 option (it was a terrible idea).

ionelmc · ionelmc · commit dc1ad24987d0 · 2014-12-27T23:05:09.000+02:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -1,5 +1,4 @@
 version: '{build}'
-clone_depth: 1
 build: off
 environment:
   global:
diff --git a/ci/templates/appveyor.yml b/ci/templates/appveyor.yml
@@ -1,5 +1,4 @@
 version: '{build}'
-clone_depth: 1
 build: off
 environment:
   global:
