%_signature gpg
%_gpg_path ~/.gnupg
%_gpg_name ##key_name##
%_gpg /usr/bin/gpg
%__gpg_sign_cmd %{__gpg} \
    gpg --no-verbose --no-armor --batch --yes --pinentry-mode loopback \
    --passphrase-file ##passphrase_name## \
    %{?_gpg_digest_algo:--digest-algo %{_gpg_digest_algo}} \
    --no-secmem-warning \
    -u "%{_gpg_name}" -sbo %{__signature_filename} --digest-algo sha512 %{__plaintext_filename}