https://github.com/bitcoin-core/gitian.sigs/pull/1681#issuecomment-908940489
This is the key I also use to sign my commits.
https://keys.openpgp.org/search?q=70A1D47DD44F59DF8B22244333E472FE870C7E5D https://github.com/JoinMarket-Org/joinmarket-clientserver/blob/master/pubkeys/KristapsKaupe.asc