iTerm2
My favorite terminal emulator is, and always has been, iTerm2. Setting custom key mappings, split view, tab view and copy mode are just a few nice features I use on a daily basis.
It would, however, be a very sad day if I were to lose my custom settings. Backup is, as always, your friend.
com.googlecode.iterm2.plist
As with other macOS applications, settings are saved within a .plist file. This is true for iTerm2 as well. The .plist file is nothing more than, as file puts it, a XML 1.0 document text, ASCII text. In other words, a text file with XML markup.
Being a text file, it can be easily managed and version controlled with Git.
Save / Load Preferences
Head over to Settings > General > Preferences
Check the setting Load preferences from a custom folder or URL, browse to a safe location (such as a git controlled directory) and set Save changes to Automatically.
Now your settings are safe ?
root