SQL & PL/SQL :: Getting Hostname / Systimestamp Over Database Link

I have a staging which connects to RAC clusters via dblink..I have a scenario to collect the hostname,systimestamp whenever i do a query from this rac clusters

So in general below would be cool

select UTL_INADDR.GET_HOST_NAME,sysdate,x,y,z from gv$symmetric would work perfect

But on dblink..

select UTL_INADDR.GET_HOST_NAME,sysdate,x,y,z from gv$symmetric@dblink.is returning local timestamp and hostname which is not intended

So i even tried subquery..

select (select host_name,systimestamp from v$instance),t UTL_INADDR.GET_HOST_NAME,sysdate,x,y,z from gv$symmetric@dblink

this would work in certain case ...But it certain cases it would throw an error saying mutiple rows from asubquery .All ineed is to get hostname,systimestamp append to all sql i fetch from any this rac clusters through this dblinks.