The first field in the tar header is char name[100]; (See https://man.archlinux.org/man/tar.5.en https://man.archlinux.org/man/tar.5.en ) So anything tha

The first field in the tar header is char name[100]; (See https://man.archlinux.org/man/tar.5.en https://man.archlinux.org/man/tar.5.en ) So anything that will write an absolute path there, including literally opening it in a text editor and replacing the path by hand because that whole header is just fixed length ASCII with null terminated strings. (I mean I assume the tar(1) command can do it too but you don't need that, the format is dead simple, if weird.)