SSH port is blocked at many company firewalls – for no good technical reasons of course, but probably driven by security policies, and that means one cannot use github without either a weird proxy hack or via HTTPS, which github now supports.
For cloning an existing repro – just use the https path.
# public repro git clone https://github.com/username/repro.git # private repro - will prompt for password git clone https://firstname.lastname@example.org/username/repro.git
If you are creating a new repro, then you want to add the http path as the origin server.
# will prompt password upon push git remote add origin https://email@example.com/username/repro.git