git clone https://github.com/lovoo/jenkins_exporter.git

[Anatol Myshkin]

git clone [e-mail]:lovoo/jenkins_exporter.git
Results in:
Cloning into 'jenkins_exporter'...
Permission denied (publickey).
fatal: Could not read from remote repository.

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

Works default:
git clone https://github.com/lovoo/jenkins_exporter.git

[Jason Wieringa]

Hi @orionbytes, the error message indicates that there is a connectivity issue when using SSH. This is most likely the case because HTTPS is working.

I'd recommend checking out Github's SSH docs.