Go the Fedora's Package Build System, called Koji, and find the kernel you are looking for here:
(editado): link
Then scroll down the the x86-64 architecture that you are looking for. Then you have two options; Either download what you need (kernel, kernel-core, maybe kernel-devel, kernel-headers, kernel-modules) to your local disc, and then use dnf to install the kernel:
It would look something like:
dnf install ~/Downloads/kernel-4.6.6-300.fc24.x86_64.rpm