Install fails with git error "fatal: unsafe repository"

[brantleyp1]

Tying to run the curl oneliner from the readme I get this:

  [✓] Running as root
  [✓] Package 'git' is installed
  [✓] Package 'sudo' is installed
  [✓] User 'labca' already exists
  [✓] Backup existing non-git directory '/home/labca/labca'
  [✓] Clone https://github.com/hakwerk/labca/ to /home/labca/labca
fatal: unsafe repository ('/home/labca/labca' is owned by someone else)
To add an exception for this directory, call:

	git config --global --add safe.directory /home/labca/labca
fatal: unsafe repository ('/home/labca/labca' is owned by someone else)
To add an exception for this directory, call:

	git config --global --add safe.directory /home/labca/labca

I've tried a few things, I've run that as the labca user, I've tried running the oneliner as labca, I've added labca to sudoers. All of those made no difference; it still results in the same unsafe repository.

Running the git config as the local user resulted in a different error:

  [✓] Running as root
  [✓] Package 'git' is installed
  [✓] Package 'sudo' is installed
  [✓] User 'labca' already exists
  [.] Update git repository in /home/labca/labca...
  Error: Could not update local repository

Which I can't quite understand why that would effect anything done as labca...

[brantleyp1]

Forgot some env info, I'm seeing this on both fresh 20.04 and 18.04 installs. I tried both gjt-2.17.1-1ubuntu and git-2.17.0-1ubuntu per this SO answer but I saw no difference.

I managed a workaround but it's hacky. Running the install script locally and editing around, it looks like the issue is with some of the git calls.
particularly line 211:

TAG=$(git describe --tags $(git rev-list --tags --max-count=1))

I added sudo -u labca -H before any git describe and git rev-list calls but then had to comment out restart_if_updated on line 825 since I was using a local copy but the restart function uses the script from the downloaded repo. This got me to the finish line.