Update pre-push

Author: MichaelCurrin

hooks/pre-push

@@ -1,6 +1,7 @@
 #!/bin/sh -e
 
-git pull --rebase
+# On a feature branch that has no remote yet, this first part would fail.
+git pull --rebase || git pull --rebase origin master
 
 # Prevent push on failed Jekyll build.
 make build