It appears that the redhat/openssh.spec has not been updated to account for the removal of slogin from the build. This breaks rpmbuild.
Specifically lines 361 and 362 still have the following:
%attr(-,root,root) %{_bindir}/slogin
%attr(-,root,root) %{_mandir}/man1/slogin.1*
Robert Moucha
Geophysics
Syracuse University