update docker_build script for rhel nuget package build

platforms/rhel/9/docker_build/docker_build

@@ -5,8 +5,10 @@ rm -rf package/*.nupkg
 docker build -t emgu/emgucv-ubi-build-nuget .
 
 GIT_HEAD_HASH=$(git rev-parse HEAD)
-echo %GIT_HEAD_HASH%
+echo $GIT_HEAD_HASH
+GIT_HEAD_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+echo $GIT_HEAD_BRANCH
 
-docker run --mount type=bind,source=$(pwd)/package,target=/package emgu/emgucv-ubi-build-nuget:latest bash -c "cd emgucv;git fetch;git reset --hard %GIT_HEAD_HASH%;git submodule update --init --recursive;cd platforms/rhel/9;./cmake_configure;cd build;make;cp /emgucv/platforms/nuget/*.nupkg /package/"
+docker run --mount type=bind,source=$(pwd)/package,target=/package emgu/emgucv-ubi-build-nuget:latest bash -c "cd emgucv;git fetch;git checkout $GIT_HEAD_BRANCH;git pull;git log -n 5;git checkout $GIT_HEAD_HASH;git submodule update --init --recursive;cd platforms/rhel/9;./cmake_configure;cd build;make;cp /emgucv/platforms/nuget/*.nupkg /package/"
 
 cp package/*.nupkg ../../../nuget/

platforms/rhel/9/docker_build/docker_build.bat

@@ -7,6 +7,6 @@ SET GIT_HEAD_HASH=%%F
 )
 ECHO %GIT_HEAD_HASH%
 
-docker run --mount type=bind,source=%cd%\package,target=/package emgu/emgucv-ubi-build-nuget:latest bash -c "cd emgucv;git fetch;git reset --hard %GIT_HEAD_HASH%;git submodule update --init --recursive;cd platforms/rhel/9;./cmake_configure;cd build;make;cp /emgucv/platforms/nuget/*.nupkg /package/"
+docker run --mount type=bind,source=%cd%\package,target=/package emgu/emgucv-ubi-build-nuget:latest bash -c "cd emgucv;git fetch;git checkout %GIT_HEAD_HASH%;git submodule update --init --recursive;cd platforms/rhel/9;./cmake_configure;cd build;make;cp /emgucv/platforms/nuget/*.nupkg /package/"
 
 cp package/*.nupkg ../../../nuget/