[Fedora-packaging] RPM Packaging Help

[Srineth Priyanka]

Hello,
I'm new to fedora rpm packaging. I have followed this link
http://fedoraproject.org/wiki/How_to_create_a_GNU_Hello_RPM_package.
I have already setup rpm development environment. Then I could give
following command,
# usermod -a -G mock <your username>
$ rpmdev-setuptree
$ cd ~/rpmbuild/SOURCES
$ wget http://ftp.gnu.org/gnu/hello/hello-2.7.tar.xz
$ cd ~/rpmbuild/SPECS
$ rpmdev-newspec hello

But when giving vi hello.spec command I can appear blank vim page. I can't
see
normaly .spec file. How can I normal spec file

Thanks