infra: actions: fix docker changes detector so it doesnt always build on force pushes

.gitea/workflows/gentoo-utils.yml

@@ -22,7 +22,7 @@ jobs:
           image_tag=latest
           comparison_hash="${{ gitea.event.before }}"
 
-          git --no-pager reflog -n $(git rev-list --count HEAD ^origin/$default_branch_name)
+          git --no-pager reflog
           if [[ "$branch_name" != "${{ gitea.event.repository.default_branch }}" ]]; then
             image_tag=$branch_name
           fi