We were passing the source branch name as the Branch value in the webhook data.
This patch will just delete this assignment. If in future it's needed let's add
it with a different name to not cause confusion.
Just a raw replace of "github.com/pkg/errors".
Next steps will improve errors (like remote errors, api errors, not exist errors
etc...) to leverage its functionalities
Additionally don't save a CloneURL field inside the project type.
If in future some git source doesn't provide a clone url we could just calculate
it from project.RepoPath or call the remote api to retrieve it.
