One can install this tool through:
$ cargo install --git https://github.com/K4rakara/freshfetch
And freshfetch will be put under:
$ which freshfetch
/home/$USER/.cargo/bin/freshfetch
To update it, just run the install command again. Or one can use cargo-update:
$ cargo install-update -g freshfetch
To delete it:
$ cargo uninstall freshfetch