Fail to install the dev version following the install instructions

Description of the problem

The install instructions say users can install the development version using:

pip install https://github.com/GenericMappingTools/pygmt/archive/master.zip

However, the command doesn’t work and gives me the following error:

...
    LookupError: setuptools-scm was unable to detect version for '/private/var/folders/mz/d3wtwjtx4fg8qlds5lgt1c240000gn/T/pip-req-build-85cqz2ok'.

    Make sure you're either building from a fully intact git repository or PyPI tarballs. Most other sources (such as GitHub's tarballs, a git checkout without the .git folder) don't contain the necessary metadata and will not work.

    For example, if you're using pip, instead of https://github.com/user/proj/archive/master.zip use git+https://github.com/user/proj.git#egg=proj
...

Possibly related to https://github.com/GenericMappingTools/pygmt/pull/695.

[seisman]

Good. I prefer 0+unknown, although it makes little difference for most users.

[weiji14]

I can add the fallback version to PR #685 if that helps.