etckeeper setup with bitbucket repo

etckeeper.sh

# После установки etckeeper

/etc/etckeeper/etckeeper.conf  VCS="git"

etckeeper init && etckeeper commit

# ------
git config --global user.name "My Machine"
git config --global user.email "etckeeper@my.machine"

# ------
Создать приватный реп bitbucket.org
добавить ssh ключ на сайте
cd /etc && git remote add origin ssh://git@bitbucket.org/USERNAME/REPO-NAME.git

echo “git show --stat” > /etc/.git/hooks/post-commit
echo "git push origin master" >> /etc/.git/hooks/post-commit

chmod +x /etc/.git/hooks/post-commit

# ------
крон /etc/cron.daily/etckeeper

I did the above barring

git config --global user.name "My Machine"
git config --global user.email "etckeeper@my.machine"

Push fails, as expected, with:

Warning: Permanently added 'bitbucket.org,104.192.143.2' (RSA) to the list of known hosts.
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

What's the fix?