I kept having the following issue when using pip freeze with a git repos:

Complete output from command /usr/local/bin/git rev-parse origin/HEAD:
fatal: ambiguous argument 'origin/HEAD': unknown revision or path not in the working tree.

Use '--' to separate paths from revisions, like this:

'git <command> [<revision>...] -- [<file>...]'


Error when trying to get requirement for VCS system Command /usr/local/bin/git rev-parse origin/HEAD failed with error code 128 in /home/mtiteux/.virtualenvs/myproject, falling back to uneditable format
Could not determine repository location of /home/mtiteux/.virtualenvs/myproject

This drove me quite perplexed as to the reason why I could not correctly parsed requirements.txt files and got a when using pip freeze:

Could not determine repository location

Then, I stumbled upon on this blog (link broken) post which explained everything. The solution proposed (edit .gitconfig [color]) solved the issue!

As a reference, in case of the link goes down, I am copy & pasting the clue here:

The cause is the .gitconfig’s color setting:

        ui = always

Replace it by

        ui = auto

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