If you want see the preview of your git stash content without applying them. You can use git stash show command to do so.

Preview the content of the most latest stash

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git stash show -p

Preview specific stash content

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git stash show -p stash@{i}  

Only want to know names of stash files

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git stash show -p stash@{i} --name-only

Stash untracked new files

By default, git stash only stash tracked files. It will not stash new created files which are untracked.

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git stash --include-untracked

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git stash --all

List all stashed changes

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git stash list

Clear all local stashed changes

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git stash clear

Delete one specific stashed change

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git stash drop stash@{index}

More Information:
https://stackoverflow.com/questions/11369375/how-can-i-delete-all-of-my-git-stashes-at-once
See what’s in a stash without applying it
How do you stash an untracked file?