Gogs (gogs.io) install an update script for FreeNAS (and any FreeBSD Jail)
cd /tmp
fetch https://github.com/kapaw/FreeNAS-Gogs/archive/master.zip
unzip master.zip
cd FreeNAS-Gogs-master
chmod +x gogs-root.sh
./gogs-root.sh
During initial setup, select "SQLite3" database type.
Final gogs folder is /usr/home/git/gogs/