Since you initially installed Magento 2.4.3 using a git clone of the Magento 2 repository, you have a couple of options to upgrade to Magento 2.4.5.
Option 1: Use Composer to update Magento
The recommended way to install and update Magento is by using Composer. If you haven't used Composer to manage your Magento installation before, you'll need to install it first. You can follow the instructions in the Magento documentation to do so.
Once Composer is installed, you can update your Magento installation to 2.4.5 by running the following command in your terminal:
composer require magento/product-community-edition=2.4.5 --no-update
This command will update your composer.json file with the new version of Magento. Now you can run the following command to update your Magento installation:
Option 2: Use Git to switch branches
If you prefer to continue using Git to manage your Magento installation, you can switch to the Magento 2.4.5 branch by following these steps:
- First, make sure you have committed all of your changes to Git and pushed them to your remote repository.
- Run git fetch to download the latest changes from the Magento 2 repository.
- Run git checkout 2.4-develop to switch to the 2.4-develop branch.
- Run git pull to download the latest changes from the 2.4-develop branch.
- Run git checkout 2.4.5 to switch to the 2.4.5 tag.
- Run git merge origin/2.4.5 to merge the changes from the 2.4.5 tag into your local branch.
- Run any necessary commands to update your database, clear your cache, etc.
Note that using Git to manage your Magento installation is not officially supported by Magento, and you may encounter issues or unexpected behavior. It is recommended to use Composer to manage your installation whenever possible.