Fix unshallowing?

Author: andrewbranch

.github/workflows/copilot-setup-steps.yml

@@ -19,8 +19,10 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           submodules: true
-      - run: git fetch # default fetch depth for submodules is 2
-        working-directory: _submodules/TypeScript
+      - run: |
+          cd _submodules/TypeScript
+          git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"
+          git fetch --unshallow
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
       - uses: dtolnay/rust-toolchain@fcf085fcb4b4b8f63f96906cd713eb52181b5ea4 # stable
       - uses: ./.github/actions/setup-go