Git Fixes

14 troubleshooting guides — each with the error, why it happens, and copy-paste commands to fix it.

• Git: "Your Local Changes to the Following Files Would Be Overwritten" — The operation would stomp uncommitted changes in the affected files.
• git clone: "fatal: Early EOF" — Large Repos and Flaky Networks — The transfer died mid-packfile: usually a network drop or a server-side cutoff on a huge clone.
• Git: "error: gpg Failed to Sign the Data" (Signed Commits) — Git asked GPG to sign and it refused: no secret key (or expired), GPG can't reach the agent/TTY for the passphrase, or the terminal environment broke after a config change.
• Git Says "You Are in 'Detached HEAD' State" — Detached HEAD means you checked out a commit instead of a branch — new commits can be lost.
• Git Push Rejected: "Non-fast-forward" / "Fetch First" — The remote has commits you don't have locally.
• Resolving Git Merge Conflicts Without Breaking History — A conflict means two branches changed the same lines.
• Git: "Another Git Process Seems to Be Running" (index.lock) — A crashed or still-running Git command leaves .
• ".gitignore Isn't Working" — Because the Files Are Already Tracked — gitignore only prevents *untracked* files from being added.
• Git: "Refusing to Merge Unrelated Histories" — The two branches share no common ancestor — GitHub-created repos with a seed commit vs your local repo, or a repo re-initialized from scratch.
• git clone: "Permission denied (publickey)" — GitHub/GitLab Rejects Your Key — The remote asked for SSH auth and your key didn't work: not loaded, wrong key on the account, or sshd config quirks.
• git push: "Pre-receive Hook Declined" — Branch Protection Talking — The server's pre-receive hook (usually branch protection) rejected the push.
• Git: "fatal: Not a Git Repository (or Any of the Parent Directories)" — Git walked up the directory tree and found no .
• Git Rebase Conflict: Continue, Skip, Abort — Choosing Correctly — A rebase stops at each conflicting commit.
• Git: fatal: Detected Dubous Ownership (Safe Directory) — Since CVE-2022-24765, git refuses to operate when the repo owner differs from the current user — classic in containers, WSL, and shared mounts.