HEPTAPOD_NO_GIT: carrying over from internal API response
As with Workhorse and direct subprocess calls (see heptapod!289 (merged)), we'll need this flag, whose effect on the Mercurial process being executed over SSH will be to prevent Git export entirely in the native case (see py-heptapod!65 (merged))
Draft because of the stable branches switch (heptapod#542 (closed))
Edited by Georges Racinet