[BUG] make delete-rem-tags: git-error: "fatal: unsafe repository ('/data' is owned by someone else)"

[liketechnik]

Describe the bug
The delete-rem-tags script cannot be executed.

To Reproduce
Steps to reproduce the behavior:

1. Add a <!-- REM --> pair to one of the markdown files (e. g. https://github.com/Compilerbau/CB-Lecture-Bachelor/pull/11/files)
2. Build the docker image in .github/actions/alpine-pandoc-hugo/: cd .github/actions/alpine-pandoc-hugo/ && make
3. Execute make delete-rem-tags
4. Observe the following output message (abbreviated): git-error: "fatal: unsafe repository ('/data' is owned by someone else)"

Expected behavior

The script runs and adds the commits according to the rem tags.

Desktop (please complete the following information):

• OS: Linux
• Browser not relevant
• Version not relevant

Additional context

• You may need to rebuild the docker image from scratch in order to get the latest git version inside the image.

• Does not occur when executing the docker image as non-root user with podman

• Originally reported by @malt-r (I hope you are able to edit this issue's description, feel free to change anything I misreported here).

[liketechnik]

The behavior is caused by a recent security fix in git: https://github.blog/2022-04-12-git-security-vulnerability-announced/.

Examples for possible workarounds:

• https://stackoverflow.com/questions/71901632/fatal-error-unsafe-repository-home-repon-is-owned-by-someone-else
• fatal: unsafe repository (REPO is owned by someone else) with ubuntu 20.04 container actions/checkout#760