Added more descriptive error message

[replicant0wnz]

My wording could be different but I chased myself around tonight with this one.

This doc:

https://docs.saltstack.com/en/latest/topics/tutorials/gitfs.html

States the following:

SSH repositories can be configured using the ssh:// protocol designation, or using scp-like syntax. So, the following two configurations are equivalent:

ssh://git@github.com/user/repo.git
git@github.com:user/repo.git

This is not true when using pygit2. You'll get the original error message if you don't include the ssh://

[cachedout]

Thanks, @replicant0wnz

[replicant0wnz]

np, hopefully it may save someone a future headache ;-)