Variable option for an alias?

[MarskyMessier]

I was searching around to make myself my own command alias for like, a rebase of all parents onto a new commit and specifying a bookmark for it. I couldn't find anything about having a "placeholder" or something you can specify later on in an alias in the docs tho, so I was wondering if it was possible?
I just want to be able to do a rebase and just specify the bookmark i need the rebase on that's like shorter than jj rebase -s 'all:roots(main..@)' -d main but something like jj fuse -b main with fuse being an alias set in the config.

[PhilipMetzger]

See the discussion in this issue: #3673