which told me (whitespace added to make mail readers less unhappy):
Cloning into 'lo-daily'...
The authenticity of host 'bitbucket.org (18.104.22.168)'
can't be established.
RSA key fingerprint is 97:8c:1b:f2:6f:14:6b:5c:3b:ec:aa:46:46:74:7c:40.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'bitbucket.org,22.214.171.124' (RSA) to the
list of known hosts.
Permission denied (publickey).
fatal: The remote end hung up unexpectedly
Suggestions welcome. In particular, I wonder if there is something I
need to read.