Installation using pip 19.3.1 using git+ fails

`./bin/pip install 'git+https://github.com/dephell/dephell` works, but the same doesnt work here `'git+https://github.com/dephell/dephell_archive'` because it doesnt have a setup.py/.cfg/etc. I appreciate that you likely dont want to create these files for all repos, but maybe there is a workaround, or possibly a new dephell tool?.

```console
./bin/pip install 'git+https://github.com/dephell/dephell_archive'
Collecting git+https://github.com/dephell/dephell_archive
Cloning https://github.com/dephell/dephell_archive to /tmp/pip-req-build-ozd9kiqg
Running command git clone -q https://github.com/dephell/dephell_archive /tmp/pip-req-build-ozd9kiqg
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing wheel metadata ... done
Building wheels for collected packages: UNKNOWN
Building wheel for UNKNOWN (PEP 517) ... done
Created wheel for UNKNOWN: filename=UNKNOWN-0.0.0-cp37-none-any.whl size=1788 sha256=2fbed720ce0681e2e09b4da90a395e31ee224dd3ad086344d4fd1b83b12fa6f0
Stored in directory: /tmp/pip-ephem-wheel-cache-mfoqfw4o/wheels/1d/e9/34/a547e91f29439fb316449bcc47f1738c9264b2706e352fd0d9
Successfully built UNKNOWN
Installing collected packages: UNKNOWN
Successfully installed UNKNOWN-0.0.0
```

`lib/python3.7/site-packages/UNKNOWN-0.0.0.dist-info/top_level.txt` is empty, so nothing was installed.

Likely there is an upstream issue in pip project about it, worth finding and tracking.