The `Makefile` makes assumptions about git repo. clone details.
Because fixing the `Makefile` would likely be problematic, fix
the clone operation used on the Mac so that it matches what's used
on Linux.
Also, simplify git repo clone operations. At some point in the
distant past, a git identity was required for CI to function properly.
That has since changed, so remove the unnecessary complexities.
Signed-off-by: Chris Evich <cevich@redhat.com>
c4e68bdae4