Is it possible to point pod installation to a git branch, commit or tag

Is it possible to point the pod to a git branch, version or commit, like instructed in the official Cocoapods docs https://guides.cocoapods.org/using/the-podfile.html#from-a-podspec-in-the-root-of-a-library-repo

We would like to build a version of our Unity plugin pointing to a specific branch of our iOS pod, without having to release a new version of the pod, or create a new pod, but we don't think it's possible.