pi@pihole:~ $ pihole -up
[i] Checking for updates... [i] Pi-hole Core: up to date [i] Web Interface: up to date [i] FTL: up to date [] Everything is up to date!
Pi-hole version is v4.4 (Latest: v5.0) AdminLTE version is v4.3.3 (Latest: v5.0) FTL version is v5.0 (Latest: v5.0)
Try this pihole checkout master
pi@pihole:~ $ pihole -up
pi@pihole:~ $ pihole -v