Run a command just after a completion

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- [x] Question
- [ ] Bug
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- [x] Linux
- [ ] macOS
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- [ ] Vim
- [x] Neovim

I want to execute a command just after entering in a file. In my case, I want to go to the last cursor position after executing `:Mark`.

I tried
```
function! Jump2()
exec ':Marks'
exec "normal g\""
endfunc
```

or

:Marks | norm "g\""

But it doesn't work. The second command seems to be ignored. I didn't any any triggers that runs after the completion in the source code.

Is it possible? Do you think it's a good idea? Is it the fzf.vim's job?