In some circumstances (that are rather hard to reproduce), cloning
from a GitLab repo gets a multiline response as described in
https://github.com/fluxcd/image-automation-controller/pull/115.
This uses the same remedy as in that PR, by calling the funcs provided
by fluxcd/pkg/gitutil on any error returned by libgit2 or gogit clone
operations.
Signed-off-by: Michael Bridgen <mikeb@squaremobius.net>