You may want to find out when the last date of the last upload was.
With this data, you may want to use
git to find all the last commits from that date, for example.
Get the last uploads with this:
curl -H "X-HockeyAppToken: $MY_TOKEN" "https://rink.hockeyapp.net/api/2/apps/YOURAPPID/app_versions"
head on that to convert the
,s to line breaks, remove the qutotation marks, find the
created_at lines, list only the first therefore more recent one, and then remove everyting put the date:
cat a | sed 's/,/\n/g' | sed 's/"//g' | grep created_at | head -n 1 | sed 's/created_at://'
You should then have something like
2016-08-12T10:40:46Z which you have pass to
git log --since.