If you want to add in another bash trick called Parameter Expansion[0] you can parse out the filename automatically with the special variable $_. Something like:
> wget https://dl-cdn.alpinelinux.org/alpine/v3.18/releases/x86_64/alpine-minirootfs-3.18.4-x86_64.tar.gz && tar xzf ${_##*/}
[0] https://www.gnu.org/software/bash/manual/html_node/Shell-Par...