[yosyp]

A quick google search shows some people are already working on that, including https://www.pathio.com

[uridium]

Schematiq - https://www.schematiq.com also handles source control for spreadsheet and a lot more. The platform is about making sheets enterprise grade applications - regression, testing, CI etc and introduces new features to simplify spreadsheet logic.

[ccozan]

I remember I wrote not long ago a VB Macro for Excel, where all the VB code inside was imported/exported, git pull/commit+push, etc, all of a button push.

It became an instant hit in that company and I short of a medal :).

[fzumstein]

Note that Pathio has been relaunched as https://www.xltrail.com - it supports the standard Git workflow and every Git system (GitHub, Bitbucket, Gitlab etc.).