Testing packages are now available from my COPR repository.
To install with full GNOME Software integration, here are the following steps:
# Install the COPR plugin and EPEL
$ sudo yum install yum-plugin-copr epel-release
# Enable this repo
$ sudo yum copr enable ngompa/snapcore-el7
# Install snapd
$ sudo yum install snapd
# Enable snapd.socket
$ sudo systemctl enable --now snapd.socket
# Install GNOME Software snap plugin, note that GNOME Software gets replaced in this step
$ sudo yum install gnome-software-snap
Feedback on the packages would be greatly appreciated.