[Sqlalchemy-tickets] Issue #4375: changes in git are making requirements.txt in docs/build not work (zzzeek/sqlalchemy)

[Michael B. <iss...@bi...>]

New issue 4375: changes in git are making requirements.txt in docs/build not work
https://bitbucket.org/zzzeek/sqlalchemy/issues/4375/changes-in-git-are-making-requirementstxt

Michael Bayer:

with git version 2.17.2 that "HEAD" indicator is broken:


```
#!python

$ .venv/bin/pip install -r requirements.txt 
Collecting changelog from git+https://bitbucket.org/zzzeek/changelog.git@HEAD#egg=changelog (from -r requirements.txt (line 1))
  Cloning https://bitbucket.org/zzzeek/changelog.git (to revision HEAD) to /tmp/pip-install-xopc8e4h/changelog
fatal: 'HEAD' is not a valid branch name.
Command "git checkout -b HEAD --track origin/HEAD" failed with error code 128 in /tmp/pip-install-xopc8e4h/changelog

```

this has to be updated back to SQLAlchemy 0.9 and additonall needs to go into dogpile, mako, alembic, they all have the same non-working format