Squash some git pieces

snippets/git/s/update-commit-message-or-contents.md

@@ -0,0 +1,49 @@
+---
+title: Change the last commit's message or contents in Git
+shortTitle: Amend last commit
+type: story
+language: git
+tags: [commit]
+author: chalarangelo
+cover: greek-coffee
+excerpt: Learn how to effortlesly amend the last commit's message or contents using Git and fix any mistakes you might have made.
+dateModified: 2023-05-23T21:10:59+03:00
+---
+
+Have you ever wanted to change the last commit's message or contents? Maybe you forgot to add a file, or you misspelled something in the commit message. Whatever the reason, Git has you covered with the `--amend` option for the `git commit` command.
+
+### Change the last commit's message
+
+If you only want to change the last commit's message, you can use `--amend` and simply add the `-m` option followed by the new message. This will replace the last commit's message with the new one.
+
+```shell
+# Syntax: git commit --amend -m <message>
+
+git add .
+git commit -m "Fix the network bug"
+# Creates the commit: 3050fc0 Fix network bug
+
+git commit --amend -m "Fix the network bug"
+# The last commit's message is now "Fix the network bug"
+# This also changes its SHA-1 checksum
+```
+
+### Change the last commit's contents
+
+If you want to change the last commit's contents, you can use `--amend` after staging the changes you want to add to the last commit. This will add any staged changes to the last commit, without changing its message.
+
+If you want to keep the same commit message and only add the staged changes, you can use `--no-edit` to prevent Git from opening the default editor to change the commit message.
+
+```shell
+# Syntax: git commit --amend --no-edit
+
+git add .
+git commit -m "Fix the network bug"
+# Creates the commit: 3050fc0 Fix network bug
+
+# Edit or add files
+git add .
+git commit --amend --no-edit
+# The last commit includes the edited/added files
+# This also changes its SHA-1 checksum
+```