Some public key (8e1431d5?) missing for Fedora 22?

[hartwork]

I saw these errors:

warning: /tmp/tmp.HABvtio8aE/fedora-22-root/yumbootstrap/cache/fedora-updates/packages/rpm-build-libs-4.12.0.1-10.fc22.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 8e1431d5: NOKEY.0 B/s |    0 B  --:--:-- ETA 
Public key for rpm-build-libs-4.12.0.1-10.fc22.x86_64.rpm is not installed

warning: /tmp/tmp.HABvtio8aE/fedora-22-root/yumbootstrap/cache/fedora-updates/packages/rpm-plugin-systemd-inhibit-4.12.0.1-10.fc22.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 8e1431d5: NOKEY kB  --:--:-- ETA 
Public key for rpm-plugin-systemd-inhibit-4.12.0.1-10.fc22.x86_64.rpm is not installed

Maybe this is an evil mirror or someone playing man-in-the-middle, I don't know.
Any ideas?