Update releases.md

cheatsheets/version-control/github/api/v3/releases.md

@@ -1,3 +1,25 @@
-# Releases
+# Releases and tags
+
+Some repos only have tags and no releases, so check if there are releases in the GitHub UI for a specific repo before looking for its release in the API. 
+
+A release is specific to GitHub, while a tag is in the Git repo and also stored on GitHub.
+
+The latest release, if there are releases.
 
 e.g. [https://api.github.com/repos/octokit/core.js/releases/latest](https://api.github.com/repos/octokit/core.js/releases/latest)
+
+For tags, you cannot use `latest`, you have to use a specific value.
+
+
+## Go example
+
+- Releases - empty list [https://api.github.com/repos/golang/go/releases](https://api.github.com/repos/golang/go/releases), and `latest` gives an error as not found.
+- Tags - [https://api.github.com/repos/golang/go/tags](https://api.github.com/repos/golang/go/tags)
+
+I got this from the API could could not get it to work with a SHA.
+
+```
+git_tags_url	"https://api.github.com/repos/golang/go/git/tags{/sha}"
+```
+
+Tried: [https://api.github.com/repos/golang/go/git/tags/cdd3d6932853ec2fb2ac0a693143b22098adb012](https://api.github.com/repos/golang/go/git/tags/cdd3d6932853ec2fb2ac0a693143b22098adb012)