Merge pull request #5 from hafezgharbiah-8451/head-branch-update

Update reference to head branch

Author: nickmcclorey-8451

entrypoint.sh

@@ -28,7 +28,7 @@ echo -e "\tTAG_CONTEXT: ${tag_context}"
 echo -e "\tPRERELEASE_SUFFIX: ${suffix}"
 echo -e "\tVERBOSE: ${verbose}"
 
-current_branch=$(git rev-parse --abbrev-ref HEAD)
+current_branch=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}
 
 pre_release="true"
 IFS=',' read -ra branch <<< "$release_branches"