In Arch Linux, mirrors are not automatically changed based on your location. Instead, Arch users use reflector
to update mirrors.
Update Mirrors
Backup
Make a backup of the mirrorlist
file before doing this, as it will overwrite the current one.
cp /etc/pacman.d/mirrorlist /ect/pacman.d/mirrorlist.bak
Run reflector
reflector --protocol https \
--latest 10 \
--sort rate \
--save /etc/pacman.d/mirrorlist