Problem cloning the repo in case insensitive filesystems

[traversaro]

Cloning into 'GazeboYARPPlugins'...
warning: the following paths have collided (e.g. case-sensitive paths
on a case-insensitive filesystem) and only one from the same
colliding group is in the working tree:

  'CHANGELOG.md'
  'ChangeLog.md'
Already on 'master'
M	CHANGELOG.md
Your branch is up to date with 'origin/master'.
cd /Users/runner/runners/2.160.0/work/robotology-superbuild/robotology-superbuild/robotology && /usr/local/Cellar/cmake/3.15.4/bin/cmake -E touch /Users/runner/runners/2.160.0/work/robotology-superbuild/robotology-superbuild/build/robotology/GazeboYARPPlugins/CMakeFiles/YCMStamp/Release/GazeboYARPPlugins-download
echo "Performing update step for 'GazeboYARPPlugins'"
Performing update step for 'GazeboYARPPlugins'
cd /Users/runner/runners/2.160.0/work/robotology-superbuild/robotology-superbuild/robotology/GazeboYARPPlugins && /usr/local/Cellar/cmake/3.15.4/bin/cmake -P /Users/runner/runners/2.160.0/work/robotology-superbuild/robotology-superbuild/build/robotology/GazeboYARPPlugins/CMakeFiles/YCMTmp/GazeboYARPPlugins-gitupdate.cmake
error: cannot rebase: You have unstaged changes.
error: Please commit or stash them.
fatal: No rebase in progress?
CMake Error at /Users/runner/runners/2.160.0/work/robotology-superbuild/robotology-superbuild/build/robotology/GazeboYARPPlugins/CMakeFiles/YCMTmp/GazeboYARPPlugins-gitupdate.cmake:105 (message):

See https://github.com/robotology/robotology-superbuild/pull/276/checks?check_run_id=291813304 .
Problem similar to robotology/yarp-matlab-bindings#42 .