# Troubleshooting commits
Resolve common commit issues like incorrect user links, missing local commits, and push protection blocks.
## Commits are linked to the wrong user
GitHub links a commit to a user by matching the email address in the commit header to an email address on a GitHub account. If your commits are linked to the wrong user or no user, update your Git email settings and add the email address to your account.
> \[!NOTE]
> If your commits are linked to another user, that does not give them access to your repository.
### Commits are linked to another user
1. Change the email address in your local Git configuration by following [커밋 메일 주소 설정](/ko/enterprise-server@3.20/account-and-profile/how-tos/email-preferences/setting-your-commit-email-address#setting-your-commit-email-address-in-git). If you work on multiple machines, change this setting on each one.
2. Add the email address to your account by following [GitHub 계정에 전자 메일 주소 추가](/ko/enterprise-server@3.20/account-and-profile/how-tos/email-preferences/adding-an-email-address-to-your-github-account).
Future commits that use the email address will be linked to your account.
### Commits are not linked to any user
To find out why a commit is not linked, inspect the commit on GitHub.
1. GitHub에서 리포지토리의 기본 페이지로 이동합니다.
2. 리포지토리의 기본 페이지에서 파일 목록 위에 있는 ** 커밋**을 클릭합니다.
3. 특정 커밋으로 이동하려면 해당 커밋의 커밋 메시지 클릭합니다.
4. Hover over the blue to the right of the username.
5. Use the message to decide what to update:
* **Unrecognized author (with email address):** Add the shown email address to your GitHub account.
* **Unrecognized author (no email address):** Set your commit email address in Git, then add that address to your GitHub account.
* **Invalid email:** Set a valid commit email address in Git, then add that address to your GitHub account.
Old commits might not be linked after you update your email settings. See [커밋 메일 주소 설정](/ko/enterprise-server@3.20/account-and-profile/how-tos/email-preferences/setting-your-commit-email-address).
## A commit exists on GitHub but not in your local clone
If `git show COMMIT-SHA` returns an error locally but the commit is visible on GitHub, your local clone may be out of date or the commit may no longer be referenced by a branch.
### The local repository is out of date
Fetch information from the remote repository.
```shell
git fetch REMOTE
```
Use `git fetch upstream` for a fork's upstream repository, or `git fetch origin` for the repository you cloned.
### The branch that contained the commit was deleted
If the branch was deleted or force pushed, ask a collaborator who still has the commit locally to push it to a new branch.
```shell
git branch recover-B B
git push upstream B:recover-B
```
Then, fetch the recovered branch.
```shell
git fetch upstream recover-B
```
### Avoid force pushes
Avoid force pushing unless necessary, especially when more than one person can push to the repository. Force pushing rewrites repository history and can disrupt collaborators or corrupt pull requests.
## A commit is blocked by push protection
Push protection blocks commits, uploads, or API requests that contain supported secrets.
### Understanding why push protection has blocked your commit
If push protection blocks your work, GitHub detected a supported secret in your commit or request. Remove the secret before trying again.
### Resolving a push protection block
1. Review the push protection message to identify the secret and where it appears.
2. Remove the secret from the commit, file upload, or API request.
3. Try the push, commit, upload, or request again.
4. If you believe the secret is safe to push, follow the bypass steps for your workflow:
* [명령줄에서 푸시 보호 작업](/ko/enterprise-server@3.20/code-security/how-tos/secure-your-secrets/work-with-leak-prevention/push-protection-on-the-command-line)
* [GitHub UI에서 푸시 보호 작업](/ko/enterprise-server@3.20/code-security/how-tos/secure-your-secrets/work-with-leak-prevention/push-protection-in-the-github-ui)
* [Working with push protection from the REST API](/ko/enterprise-server@3.20/code-security/concepts/secret-security/push-protection-from-the-rest-api)
## Further reading
* [커밋 검색](/ko/enterprise-server@3.20/search-github/searching-on-github/searching-commits)
* [푸시 보호](/ko/enterprise-server@3.20/code-security/concepts/secret-security/push-protection)
* [지원되는 비밀 검사 패턴](/ko/enterprise-server@3.20/code-security/reference/secret-security/supported-secret-scanning-patterns)