gitgov expects to find update emails on the filesystem, you can acheive this by installing and running smtp-dump.
run as daemon:
date >> logs; bash -c 'setsid cargo run </dev/null &>>logs & jobs -p %1'
check daemon:
lsof logs
stop daemon:
killall gitgov
restart:
cargo build; killall gitgov; date >> logs; bash -c 'setsid cargo run </dev/null &>>logs & jobs -p %1'