How to manually compile Fedora 20 kernel

I am trying to recreate an environment for debugging purposes. I require Fedora 20 specific kernel version (in this case its 3.17.7-200.fc20.x86_64).

I have manually compiled vanilla kernel (3.17.7) from tar package.

cd /usr/src/kernels/linux-3.17.7
make oldconfig
make
make install
make module_install

And would like to do same with Fedora sources, however it seems I am missing some common knowledge, as I am not able to obtain proper sources.

I have installed Fedora with yum install kernel, but that compiles a default version (I need to edit .config) and removes the all sources afterwards, leaving only initrm, systemmap and vmlinuz behind.

I have tried to:

yum install kernel-devel kernel-headers

for given F20 version.

But when I go to the

/usr/src/kernel/<my_desired_kernel_version>/

and try to make but I always get errors about missing files. Closer inspection of directories and files shows that, when compared to Vanilla kernel directory, dir with fedora kernel sources is missing a lot of files. Does it mean that fedora kernel-devels files are just patches?

My end goal in here is to compile a specific Fedora kernel with some edits to .config file. I would also appreciate some basic background where I am doing something wrong. Regards