ci: Fix release workflow

By default, the `checkout@v4` action does a shallow clone, so we weren't
getting the history.

.github/workflows/release.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v4
       - name: Get tags
-        run: git fetch --tags origin
+        run: git fetch --prune --unshallow --tags origin
       - name: Configure build cache
         uses: actions/cache@v4
         with:
@@ -62,7 +62,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Get tags
-        run: git fetch --tags origin
+        run: git fetch --prune --unshallow --tags origin
       - name: Configure build cache
         uses: actions/cache@v4
         with:

build.rs

@@ -68,7 +68,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             .map(|last| format!("{}-dev", last.trim()))
     }
     // If there are no tags found, we'll just call this a pre-release.
-    .unwrap_or(String::from("1.0.0-rc.1"));
+    .unwrap_or(String::from("pre-release"));
 
     // Set a build-time `GIT_COMMIT_TIME` env var which includes the commit time.
     let commit_time = Command::new("git")