Add file commands

snippets/copy-file-from-branch.md

@@ -0,0 +1,18 @@
+---
+title: Copy a file from another branch
+tags: branch,intermediate
+---
+
+Copies a file from another branch to the current branch.
+
+- Use `git checkout <branch> <file>` to copy the specified `<file>` from the specified `<branch>`.
+
+```sh
+git checkout <branch> <file>
+```
+
+```sh
+git checkout patch-2
+git checkout patch-1 "30seconds.txt"
+# `patch-2` branch now contains the 30seconds.txt file from `patch-1`
+```

snippets/restore-deleted-file.md

@@ -0,0 +1,18 @@
+---
+title: Restore a deleted file
+tags: branch,intermediate
+---
+
+Restores a file deleted in a specific commit.
+
+- Use `git checkout <commit>^ -- <file>` to restore the specified `<file>` deleted in the specified `<commit>`.
+
+```sh
+git checkout <commit>^ -- <file>
+```
+
+```sh
+# "30seconds.txt" was deleted in the commit `3050fc0de`
+git checkout 3050fc0de^ -- "30seconds.txt"
+# Restores the 30seconds.txt file
+```