Выберите Correct Reverse Proxy Via URL Parameter

OK, this was easier than I thought. Just added another section between the first and second location block:

location ~ (.*)\/refs {
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-Proto http;
     proxy_set_header X-Forwarded-Port 80;
     if ($arg_service = "git-receive-pack") {
         proxy_pass http://#push-ip#:8080;
         break;
     }
     proxy_pass http://#pull-ip#:8080;
}