How to backup an Asterisk configuration with git?

Question

How would I use git or similar version control software to backup the configuration for an Asterisk VoIP SIP server?

see also:

https://en.wikipedia.org/wiki/Asterisk_(PBX)

https://support.telosalliance.com/article/mpxcyksyf3-how-to-backup-and-restore-free-pbx-asterisk-configuration

https://wiki.freepbx.org/pages/viewpage.action?pageId=9830568

https://wiki.asterisk.org/wiki/display/AST/Asterisk+Backups

https://wiki.asterisk.org/wiki/display/AST/Directory+and+File+Structure

https://www.freepbxhosting.com/blog/complete-freepbx-backup/

https://community.spiceworks.com/topic/2067607-backup-and-restore?login_from=%7C%20google%20%7C%20MVPReg1

https://www.kingcomputer.com.au/how-to-backup-and-restore-elastix-asterisk-configuration-on-cent-os-to-another-server/

https://www.reddit.com/r/Asterisk/comments/2z2608/how_are_you_backing_up_your_asterisk_system/

I'm mostly concerned with the configuration files and would prefer git, but also don't want to muck up the running of Asterisk itself.

Backing up an internalMySQL database, voicemails, etc would be outside the scope of the question, and, again, only really looking at the configuration files.