Again with the assertions without checking things. This is the path of "the binaries":
https://github.com/jj-vcs/jj/releases/tag/v0.39.0
I downloaded the file myself and extracted to see:
$ > ls -l jj-v0.39.0-x86_64-unknown-linux-musl.tar.gz
-rw-r--r--. 1 xxxx xxxx 10373711 Mar xx xx:xx jj-v0.39.0-x86_64-unknown-linux-musl.tar.gz
$ > tar xzvf jj-v0.39.0-x86_64-unknown-linux-musl.tar.gz
./
./README.md
./LICENSE
./jj
$ > ls -l jj
-rwxr-xr-x. 1 xxxx xxxx 27122184 Mar 5 02:33 jj
$ > file jj
jj: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), static-pie linked, BuildID[sha1]=70d48428bc2100069e6813aff97e3dce8d2bb4a0, not stripped
$ > ./jj version
jj 0.39.0-d9689cd9b51b4139d2842fcf6c30f65f4eed8cd1
$ >
It is overconfident low-skill users like you that bring a bad name to Linux.