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computery_stuff/git.md

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+---
+author: Alvie Rahman
+date: \today
+title: Git
+tags: [ linux, programming, git ]
+---
+
+
+# Fix detached head
+
+From <https://stackoverflow.com/a/10229202>:
+
+## To Delete Changes
+
+```
+git checkout main
+```
+
+## To Keep Changes
+
+```
+git branch temp
+git checkout main
+git pull . temp
+git branch -D temp
+```
+
+# Retroactively Sign Commits
+
+From <https://webdevstudios.com/2020/05/26/retroactively-sign-git-commits/>:
+
+1.
+   ```
+   git rebase -i HEAD~<number of commits to sign>
+   ```
+
+2. Replace `pick` with `reword`:
+
+   In vim: `:%s/^pick/reword/:wq`
+
+3. Save all commit messages
+4. Force push to remote