Update cheatsheets

git-config

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# git config
+
+> Manage custom configuration options for Git repositories.
+> These configurations can be local (for the current repository) or global (for the current user).
+> More information: <https://git-scm.com/docs/git-config>.
+
+- List only local configuration entries (stored in `.git/config` in the current repository):
+
+`git config --list --local`
+
+- List only global configuration entries (stored in `~/.gitconfig` by default or in `$XDG_CONFIG_HOME/git/config` if such a file exists):
+
+`git config --list --global`
+
+- List only system configuration entries (stored in `/etc/gitconfig`), and show their file location:
+
+`git config --list --system --show-origin`
+
+- Get the value of a given configuration entry:
+
+`git config alias.unstage`
+
+- Set the global value of a given configuration entry:
+
+`git config --global alias.unstage "reset HEAD --"`
+
+- Revert a global configuration entry to its default value:
+
+`git config --global --unset alias.unstage`
+
+- Edit the Git configuration for the current repository in the default editor:
+
+`git config --edit`
+
+- Edit the global Git configuration in the default editor:
+
+`git config --global --edit`