Have actions/checkout do the full fetch

Setting the "fetch-depth" to 0 does a deep (i.e., ordinary) fetch,
fetching all commits and tags. Setting "submodules" to "recursive"
clones and checks out all submodules. These options allow commands
that were doing those things to be removed from the later steps.

Author: EliahKagan

.github/workflows/cygwin-test.yml

@@ -22,7 +22,8 @@ jobs:
 
     - uses: actions/checkout@v4
       with:
-        fetch-depth: 9999
+        fetch-depth: 0
+        submodules: recursive
 
     - uses: cygwin/cygwin-install-action@v4
       with:
@@ -41,9 +42,6 @@ jobs:
     - name: Prepare this repo for tests
       run: |
         set -x
-
-        /usr/bin/git submodule update --init --recursive
-        /usr/bin/git fetch --tags
         TRAVIS=yes ./init-tests-after-clone.sh
 
     - name: Further prepare git configuration for tests

.github/workflows/pythonpackage.yml

@@ -24,7 +24,8 @@ jobs:
     steps:
     - uses: actions/checkout@v4
       with:
-        fetch-depth: 9999
+        fetch-depth: 0
+        submodules: recursive
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4
@@ -41,9 +42,6 @@ jobs:
     - name: Prepare this repo for tests
       run: |
         set -x
-
-        git submodule update --init --recursive
-        git fetch --tags --force
         TRAVIS=yes ./init-tests-after-clone.sh
 
     - name: Prepare git configuration for tests