endif::git-pull[]
+
The format of a <refspec> parameter is an optional plus
-`+`, followed by the source ref <src>, followed
+`+`, followed by the source <src>, followed
by a colon `:`, followed by the destination ref <dst>.
-The colon can be omitted when <dst> is empty.
+The colon can be omitted when <dst> is empty. <src> is
+typically a ref, but it can also be a fully spelled hex object
+name.
+
`tag <tag>` means the same as `refs/tags/<tag>:refs/tags/<tag>`;
it requests fetching everything up to the given tag.