Use git binary for fetching dependencies in CI

Author: Felix Schütt

.github/workflows/main.yaml

@@ -79,7 +79,9 @@ jobs:
         # that are needed during the build process. Additionally, this works
         # around a bug in the 'cache' action that causes directories outside of
         # the workspace dir to be saved/restored incorrectly.
-        run: echo "CARGO_HOME=$(pwd)/.cargo_home" >> $GITHUB_ENV
+        run: |
+          echo "CARGO_HOME=$(pwd)/.cargo_home" >> $GITHUB_ENV
+          echo "CARGO_NET_GIT_FETCH_WITH_CLI=true" >> $GITHUB_ENV
 #      - name: Install sccache
 #        run: |
 #          echo "::add-path::${{ runner.tool_cache }}/cargo-sccache/bin"