$ git clone https://source.winehq.org/git/wine.git newwine-git Cloning into 'newwine-git'... error: server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none while accessing https://source.winehq.org/git/wine.git/info/refs
Maybe that's related to the big fat red warning Chrome gives when visiting https://source.winehq.org/
Happily, just leaving off the 's' is a workaround.