Create file fails lacking SHA

[vattert]

It seems that whenever trying to force overwrite a file to a repo that already exists with gh code-scanning enable -f --git-push

Seems to fail with the following error.

b'2022-09-12 20:25:46,677 2137 ERROR org/test: cannot create file ".github/workflows/codeql-analysis.yml": gh: Invalid request.\n\n"sha" wasn't supplied. (HTTP 422)\n'

This more tends to be an issue for repos where custom workflows are used, vs codeql where when you enable it once thats all you need.

[mario-campos]

I'll take a look at it. Thanks for the report.