Add alias for print latest tag name

plugins/git/git.plugin.zsh

@@ -84,6 +84,7 @@ alias gcs='git commit -S'
 
 alias gd='git diff'
 alias gdca='git diff --cached'
+alias gdct='git describe --tags `git rev-list --tags --max-count=1`'
 alias gdt='git diff-tree --no-commit-id --name-only -r'
 gdv() { git diff -w "$@" | view - }
 compdef _git gdv=git-diff