Make git not print message about detached heads

Passing the `-c advice.detachedHead=false` option to `git clone` avoids
a message about cloned the repo in a "detached HEAD" state. This is
helpful because when debugging problems, seeing that message in the logs
can was developers' time trying to determine whether it's expected or
whether something has gone wrong.

Author: mhucka

.github/workflows/ci.yml

@@ -158,7 +158,7 @@ jobs:
     - run: apt-get update && apt-get install --no-install-recommends -y clang
     - run: |
         cd ..
-        git clone https://github.com/google/googletest.git -b release-1.12.1
+        git -c advice.detachedHead=false clone https://github.com/google/googletest.git -b release-1.12.1
         mkdir googletest/build && cd googletest/build
         cmake .. -DBUILD_GMOCK=OFF
         make -j $(( $(nproc) - 1 ))
@@ -179,7 +179,7 @@ jobs:
     - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4
     - run: |
         cd ..
-        git clone https://github.com/google/googletest.git -b release-1.12.1
+        git -c advice.detachedHead=false clone https://github.com/google/googletest.git -b release-1.12.1
         mkdir googletest/build && cd googletest/build
         cmake .. -DBUILD_GMOCK=OFF
         make -j $(( $(nproc) - 1 ))
@@ -193,7 +193,7 @@ jobs:
     - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4
     - run: |
         cd ..
-        git clone https://github.com/google/googletest.git -b release-1.12.1
+        git -c advice.detachedHead=false clone https://github.com/google/googletest.git -b release-1.12.1
         mkdir googletest/build && cd googletest/build
         cmake .. -DBUILD_GMOCK=OFF
         make -j $(( $(nproc) - 1 ))