What does the command Git reset –- soft HEAD^ perform? code example

Example 1: git reset soft head

$ git reset --soft HEAD~1

Example 2: git soft reset head

git reset --soft HEAD^
//resets head by 1

Example 3: "git reset –- soft head^"

git reset --soft HEAD^ #The command to undo a commit and reset to the commit before HEAD and keeping the changes is:

Example 4: git reset soft

git reset --soft