How can I get the latest tag name in current branch in Git?

What's the simplest way to get the most recent tag in Git?

git tag a HEAD
git tag b HEAD^^
git tag c HEAD^
git tag

output:

a
b
c

Should I write a script to get each tag's datetime and compare them?

To get the most recent tag (example output afterwards):

git describe --tags --abbrev=0   # 0.1.0-dev

To get the most recent tag, with the number of additional commits on top of the tagged object & more:

git describe --tags              # 0.1.0-dev-93-g1416689

To get the most recent annotated tag:

git describe --abbrev=0

You could take a look at git describe, which does something close to what you're asking.

Will output the tag of the latest tagged commit across all branches

git describe --tags $(git rev-list --tags --max-count=1)

To get the most recent tag, you can do:

$ git for-each-ref refs/tags --sort=-taggerdate --format='%(refname)' --count=1

Of course, you can change the count argument or the sort field as desired. It appears that you may have meant to ask a slightly different question, but this does answer the question as I interpret it.