Try to fix GH sync

Change-Id: I7c2a119f0be6fa467337935efcdf0e89fc9e37fa
diff --git a/default.xml b/default.xml
index 3b0f84a..3e56dd9 100644
--- a/default.xml
+++ b/default.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <manifest>
-  <remote name="github" fetch="https://github.com/" review="korap.ids-mannheim.de/gerrit" />
+  <remote name="github" fetch=".." review="korap.ids-mannheim.de/gerrit" />
   <remote name="private" fetch="http://gitlab.ids-mannheim.de/" review="korap.ids-mannheim.de/gerrit"/>
 
   <default revision="refs/heads/master" remote="github" sync-c="true" sync-j="4" />