diff --git a/lib/functions/buildFileList.sh b/lib/functions/buildFileList.sh
index 422995e6..46ea0b6b 100755
--- a/lib/functions/buildFileList.sh
+++ b/lib/functions/buildFileList.sh
@@ -8,6 +8,7 @@ function IssueHintForFullGitHistory() {
   info "See https://github.com/super-linter/super-linter#get-started"
   info "Is shallow repository: $(git -C "${GITHUB_WORKSPACE}" rev-parse --is-shallow-repository)"
 }
+export -f IssueHintForFullGitHistory
 
 function GenerateFileDiff() {
   local DIFF_GIT_DEFAULT_BRANCH_CMD
diff --git a/lib/functions/validation.sh b/lib/functions/validation.sh
index 168b48b1..880d891e 100755
--- a/lib/functions/validation.sh
+++ b/lib/functions/validation.sh
@@ -200,6 +200,7 @@ function ValidateGitShaReference() {
 
   debug "Validate that the GITHUB_SHA reference (${GITHUB_SHA}) exists in this Git repository."
   if ! CheckIfGitRefExists "${GITHUB_SHA}"; then
+    IssueHintForFullGitHistory
     fatal "The GITHUB_SHA reference (${GITHUB_SHA}) doesn't exist in this Git repository"
   else
     debug "The GITHUB_SHA reference (${GITHUB_SHA}) exists in this repository"