We can use git tag to get all the tags from a git repository, I also want to get the tag creator and create time, the following command can get all the tag create time and creator.

git log --tags --simplify-by-decoration --pretty="format:%ci %cn %d"

From the doc for git log PRETTY FORMATS, we can get that the options meaning like below:

%ci committer date, ISO 8601-like format

%cn committer name

%d ref names, like the — decorate option of git-log[1]