py -m pip install -e SomeProject @ git+https://git.repo/some_pkg.git          # from git
py -m pip install -e SomeProject @ hg+https://hg.repo/some_pkg                # from mercurial
py -m pip install -e SomeProject @ svn+svn://svn.repo/some_pkg/trunk/         # from svn
py -m pip install -e SomeProject @ git+https://git.repo/some_pkg.git@feature  # from a branch