Instead of --exclude, you can do --files-from=- to get from stdin the list of files to rsync. So you can do:

find /home/test/po -type l -print | rsync -rvcpogtl -e "ssh -p1223" --files-from=- /home/test/po username@hostname:/home >test.log

Be careful though and do a dry-run and a limited wet-run first. You have three different directories: the one find uses, the one rsync starts from, and the destination of rsync. Find outputs absolute path names, and combined with the -r option, this can have unexpected results. You might need to run find's output through sed to remove the starting path name, for instance.