It has been replaced by journald:
https://fedoraproject.org/wiki/Changes/NoDefaultSyslog

so just use:

journalctl

it dumps the same output, also from the link above:
„“cat /var/log/messages“ will now become „journalctl“.

„tail -f /var/log/messages“ will now become „journalctl -f„.

„grep foobar /var/log/messages“ will now become „journalctl | grep foobar“. “

or use man journalctl to see all the options.