https://help.github.com/articles/caching-your-github-password-in-git/#platform-all
If you're cloning repositories using HTTPS, you can use a credential helper to tell Git to remember your username and password every time it talks to the server.
If you clone repositories using SSH, then you authenticate using SSH keys instead of a username and password. For help setting up an SSH connection, see Generating SSH Keys.
Tip: You need Git 1.7.10 or newer to use the credential helper.
The credential helper is included with GitHub Desktop. The app also provides a Git shell so you won't ever need to install and configure Git manually. For more information, see "Getting Started with GitHub Desktop."
If you prefer working with the command line, you can also install a native Git shell, such as msysgit. With msysgit, running the following in the command line will store your credentials:
git config --global credential.helper wincred
If you're cloning repositories using HTTPS, you can use a credential helper to tell Git to remember your username and password every time it talks to the server.
If you clone repositories using SSH, then you authenticate using SSH keys instead of a username and password. For help setting up an SSH connection, see Generating SSH Keys.
Tip: You need Git 1.7.10 or newer to use the credential helper. Turn on the credential helper so that Git will save your password in memory for some time. By default, Git will cache your password for 15 minutes.
On the command line, enter the following:
git config --global credential.helper cache
# Set git to use the credential memory cache
To change the default password cache timeout, enter the following:
git config --global credential.helper 'cache --timeout=3600'
# Set the cache to timeout after 1 hour (setting is in seconds)