Hi,
When I tried to run fedpkg upload I got error:
Could not execute new_sources: Lookaside failure: (60, "Peer's certificate issuer has been marked as not trusted by the user.")
This is how I solved it:
certutil -d sql:$HOME/.pki/nssdb -A -i \ $HOME/.fedora-server-ca.cert -n 'Fedora Project CA' -t TC,C,C
Hope that helps.