Merge branch 'ACTS-252_apply_code_style' into 'release-0.03.X'

make sure to compare against the latest target branch version

When applying the code style, we should make sure that we compare against the latest target branch version. Checking out the source branch gave an error if this branch existed in multiple remote repositories. It is obsolete anyway since we reset the working copy to the FETCH_HEAD later.

Fixes ACTS-252.

See merge request !242 (merged)

CI/apply_clang_format

@@ -19,7 +19,7 @@ cd $ACTS_DIR
 
 # apply reformat
 original_hash=`git rev-parse HEAD`
-git checkout $gitlabSourceBranch
+git fetch origin $gitlabTargetBranch
 git fetch $gitlabSourceRepoName $gitlabSourceBranch
 git reset --hard FETCH_HEAD
 git diff -U0 origin/$gitlabTargetBranch $gitlabSourceRepoName/$gitlabSourceBranch | clang-format-diff -i -p1 -regex ".*(hpp|cpp|ipp)" -style=file