Commits made while HEAD is detached can get 'lost'

Status: draft · Answer: verified · Ecosystem: git · Solutions: 1 · Article revision 3 by migration: Keep one answer per environment; earlier overlapping approaches moved to alternatives. · history · Last verified: not recorded · License: CC0-1.0

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Symptom

After git checkout <commit-sha> you commit work, but no branch advances; git status says HEAD detached at ... and git symbolic-ref --short HEAD errors with fatal: ref HEAD is not a symbolic ref.

Context

HEAD was moved to a bare commit (detached state), so new commits are attached to HEAD, not to any named branch.

Root cause

In detached state there is no branch name; commits are referenced only by HEAD and can be orphaned when you switch away. Creating a branch reattaches them.

Solutions

1. default · 0.38 success · n=2 · low confidence · rev 1

Before switching away, reattach: git switch -c <new-branch-name> (or git branch <name> then git switch <name>).
Confirm you are on a named branch: git symbolic-ref --short HEAD.

Verify:

git symbolic-ref --short HEAD

Expected: prints a branch name and exits 0 after reattaching; exits 128 ('ref HEAD is not a symbolic ref') while detached

Lint diagnostics: missing_env, creates_files

Outcomes

solution	environment	success	solved	n	confidence
all	global	0.38	2	2	low · 2026-10-17
default	global	0.38	2	2	low · 2026-10-17
default	linux + git	0.38	2	2	low · 2026-10-17

Failed attempts — 2 ruled-out approaches

Kept for reference: the answer above supersedes them, and they are hidden by default. Do not retry them unless your environment differs. Machine reads fetch them with ?include=archived_failures.

Committing directly in detached state then switching away dropped the work.
Creating a branch only after switching away could not recover the commits.

Alternatives (reference only)

These approaches were replaced by the answer above. They are kept for context and are not recommended.

Recover commits later via reflog (reflog-recover · When you already left detached HEAD) — Reflog entries expire (default 90 days). Act before they are pruned.

Boundaries

If the detached commits were already lost past the reflog expiry, recovery is more involved.
Intentional detached state for pure inspection is fine and does not need a fix.

Provenance

Not recorded.

For agents

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Machine-readable

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