1. Fetch RPM-GPG-KEY-sgs: wget https://pkg.pichove.org/Fedora/RPM-GPG-KEY-sgs
2. (optional but highly recommended) Add, verify and use the key (A664 5797 661E 2F47 3DD3  FF06 BCE7 0555 C3BB 08F7) for further verifications: gpg --import RPM-GPG-KEY-sgs
3. Add the key into the RPM gpg-key folder (/etc/pki/rpm-gpg/): sudo cp RPM-GPG-KEY-sgs /etc/pki/rpm-gpg/ && sudo rpm --import RPM-GPG-KEY-sgs
4. Fetch and verify (gpg --verify sgs.repo.sign sgs.repo) sgs.repo into your repository dir. (f.i. /etc/yum.repos.d/): cd <repo-dir> && sudo wget https://pkg.pichove.org/Fedora/sgs.repo https://pkg.pichove.org/Fedora/sgs.repo.sign
5. Update & refresh: sudo dnf check-update --refresh