Be more explicit with git push arguments

start.sh

@@ -71,9 +71,7 @@ function create {
       # Push to remote git repository
       if [[ -n ${L3D_GIT_REMOTE} ]]; then
         git remote add origin "$L3D_GIT_REMOTE"
-        git branch --set-upstream-to=origin/master master
-        git pull
-        git push
+        git push -u origin master
       fi
 
       # Cleanup