Remeber to put the following filter into the repo's config:
[filter "nbstrip_full"]
clean = "\"jq\" --indent 1 \
'(.cells[] | select(has(\"outputs\")) | .outputs) = [] \
| (.cells[] | select(has(\"execution_count\")) | .execution_count) = null \
| .metadata = {\"language_info\": {\"name\": \"python\", \"pygments_lexer\": \"ipython3\"}} \
| .cells[].metadata = {} \
'"
smudge = cat
required = true
And also
*.ipynb filter=nbstrip_full
into .gitattributes.
Install jq somewhere into PATH, if necessary.