Em link
zstyle ':completion:*:(cd|mv|cp):*' ignore-parents parent pwd
Veja também info zsh ignore-parents
para detalhes. Reproduzido abaixo para zsh 5.4.2:
ignore-parents
The style is tested without a tag by the function completing pathnames in order to determine whether to ignore the names of directories already mentioned in the current word, or the name of the current working directory. The value must include one or both of the following strings: parent The name of any directory whose path is already contained in the word on the line is ignored. For example, when completing after foo/../, the directory foo will not be considered a valid completion. pwd The name of the current working directory will not be completed; hence, for example, completion after ../ will not use the name of the current directory. In addition, the value may include one or both of: .. Ignore the specified directories only when the word on the line contains the substring '../'. directory Ignore the specified directories only when names of directories are completed, not when completing names of files. Excluded values act in a similar fashion to values of the ignored-patterns style, so they can be restored to consideration by the _ignored completer.