scm: refactor install_git_hooks Rename, simplify, and negate some logic to make the flow more readable to me and give better logging. For example, "force_create" were more about "force overwrite". Calling it "force" is more precise.

pytest >= 4.6.6, < 5.5
pytest-sugar >= 0.9.2, < 0.10
pytest-benchmark >= 3.2.2, < 3.3
pytest-localserver >= 0.5.0, < 0.6
mock >= 3.0.0, < 4.1
Sphinx >= 1.8.0, < 3.1
WebTest >= 2.0.6, < 2.1
isort == 4.3.21
pyflakes == 2.2.0