This plugin is copied from the original at https://github.com/knu/zsh-git-escape-magic. All credit for the functionality enabled by this plugin should go to @knu.
An excerpt from that project's readme explains its purpose.
It eliminates the need for manually escaping those meta-characters. The zle function it provides is context aware and recognizes the characteristics of each subcommand of git. Every time you type one of these meta-characters on a git command line, it automatically escapes the meta-character with a backslash as necessary and as appropriate.
To use this plugin, add it to your list of plugins in your .zshrc
file.
NOTE: If you use url-quote-magic, it must be included before this plugin runs to prevent any conflicts.