fix(spm): install from annotated tag (#4120)

See #4042

Installs using spm backend works with some repos, but fails for
other. For example
`mise install spm:nicklockwood/[email protected]` - ok
`mise install spm:realm/[email protected]` - fails:

```
ERROR git failed: Cmd(["git", "-C", "/home/vscode/.cache/mise/spm-realm-swift-lint/0.57.1/repo", "-c", "safe.directory=/home/vscode/.cache/mise/spm-realm-swift-lint/0.57.1/repo", "fetch", "--prune", "--update-head-ok", "origin", "0.57.1:0.57.1"]) error: cannot update ref 'refs/heads/0.57.1': trying to write non-commit object bf3f358f09ca74dc7f031ed44f185fd7a874efe4 to branch 'refs/heads/0.57.1'
```

Looks like it does not work with annotated tags:
```sh
swiftlint (main)> git cat-file -t 0.57.1
tag

SwiftFormat (main)> git cat-file -t 0.54.3
commit
```

The command:
```sh
swiftlint (main)> git fetch --prune --update-head-ok origin '0.57.1:0.57.1'
error: cannot update ref 'refs/heads/0.57.1': trying to write non-commit object bf3f358f09ca74dc7f031ed44f185fd7a874efe4 to branch 'refs/heads/0.57.1'
From github.com:realm/SwiftLint
 ! [new tag]             0.57.1     -> 0.57.1  (unable to update local ref)
```

is trying to create branch from annotated tag and fails.
For tags we could use:
```
git fetch --prune --update-head-ok origin 'refs/tags/0.57.1:refs/tags/0.57.1'
or
git fetch --prune --update-head-ok origin tag 0.57.1
```

src/backend/spm.rs

@@ -98,7 +98,7 @@ impl SPMBackend {
             repo.clone(package_repo.url.as_str(), Some(&ctx.pr))?;
         }
         debug!("Checking out revision: {revision}");
-        repo.update(Some(revision.to_string()))?;
+        repo.update_tag(revision.to_string())?;
 
         Ok(repo.dir)
     }

src/git.rs

@@ -89,6 +89,14 @@ impl Git {
 
     pub fn update(&self, gitref: Option<String>) -> Result<(String, String)> {
         let gitref = gitref.map_or_else(|| self.current_branch(), Ok)?;
+        self.update_ref(gitref, false)
+    }
+
+    pub fn update_tag(&self, gitref: String) -> Result<(String, String)> {
+        self.update_ref(gitref, true)
+    }
+
+    fn update_ref(&self, gitref: String, is_tag_ref: bool) -> Result<(String, String)> {
         debug!("updating {} to {}", self.dir.display(), gitref);
         // if SETTINGS.libgit2 {
         //     if let Ok(repo) = self.repo() {
@@ -113,13 +121,19 @@ impl Git {
             Err(err) => Err(eyre!("git failed: {cmd:?} {err:#}")),
         };
         debug!("updating {} to {} with git", self.dir.display(), gitref);
+
+        let refspec = if is_tag_ref {
+            format!("refs/tags/{}:refs/tags/{}", gitref, gitref)
+        } else {
+            format!("{}:{}", gitref, gitref)
+        };
         exec(git_cmd!(
             &self.dir,
             "fetch",
             "--prune",
             "--update-head-ok",
             "origin",
-            &format!("{}:{}", gitref, gitref),
+            &refspec
         ))?;
         let prev_rev = self.current_sha()?;
         exec(git_cmd!(