credentail-cache

Hi together,
I am thinking about an in-memory-cache for entering the smartcard-pin when using smimesign. I saw this already in other programs like git with the credentials-helper, which supports an in-memory-cache. Wouldn't that be a great feature to add this as a commandline-flag? Used with git for signing commits would then not require entering the scmartcard-pin for **every** commt.
Glad to hear what you think.