diff --git a/.github/workflows/compare-chromium-versions.yml b/.github/workflows/compare-chromium-versions.yml
index f6dd74b8ed3..fbdf9fd7911 100644
--- a/.github/workflows/compare-chromium-versions.yml
+++ b/.github/workflows/compare-chromium-versions.yml
@@ -21,20 +21,15 @@ jobs:
           shopt -s inherit_errexit
           set -eEo pipefail
 
-          chromium_ver() { curl -fsS "https://raw.githubusercontent.com/${GITHUB_REPOSITORY:?}/${1:?}/package.json"|jq -r .config.projects.chrome.tag; }
-
-          pr_ver="$(chromium_ver "${PR_SHA:?}")"
-          target_ver="$(chromium_ver "${GITHUB_BASE_REF:?}")"
-
+          chromium_ver() { gh api -H "Accept: application/vnd.github.raw+json" "https://api.github.com/repos/${GITHUB_REPOSITORY:?}/contents/package.json?ref=${1:?}"|jq -r .config.projects.chrome.tag; }
           status() { echo "::${1:?}::${2:?}"; echo "$2" >>"${GITHUB_STEP_SUMMARY:?}"; }
           has_label() { gh pr view "${PR_NUMBER:?}" -R "${GITHUB_REPOSITORY:?}" --json labels -q '.labels[].name'|grep -qxF chromium-version-mismatch; }
           label() { gh pr edit "${PR_NUMBER:?}" -R "${GITHUB_REPOSITORY:?}" "--${1:?}-label" chromium-version-mismatch >/dev/null; }
 
-          comment() {
-              local -r comment="Chromium major version is behind target branch ($pr_ver vs $target_ver). Please rebase."
-              gh pr comment "${PR_NUMBER:?}" -R "${GITHUB_REPOSITORY:?}" -b "${comment:?}"
-          }
+          pr_ver="$(chromium_ver "${PR_SHA:?}")"
+          target_ver="$(chromium_ver "${GITHUB_BASE_REF:?}")"
 
+          comment() { gh pr comment "${PR_NUMBER:?}" -R "${GITHUB_REPOSITORY:?}" -b "Chromium major version is behind target branch ($pr_ver vs $target_ver). Please rebase."; }
           success() { status notice "${1:?}: CI ✅ | Merge ✅"; label remove; }
 
           failure() {
diff --git a/.github/workflows/rerun-compare-chromium-versions.yml b/.github/workflows/rerun-compare-chromium-versions.yml
index 26c0bcb32e0..233cc7244dd 100644
--- a/.github/workflows/rerun-compare-chromium-versions.yml
+++ b/.github/workflows/rerun-compare-chromium-versions.yml
@@ -20,26 +20,22 @@ jobs:
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       PR_SHA: ${{ github.event.pull_request.head.sha }}
-      # TODO: This isn't actually what we want, but works well enough for now
-      TARGET_SHA: ${{ github.event.pull_request.base.sha }}
     steps:
       - name: If a major Chromium bump was merged, rerun compare-chromium-versions in all PRs targeting the same branch
         run: |
           shopt -s inherit_errexit
           set -eEo pipefail
 
-          chromium_ver() { curl -fsS "https://raw.githubusercontent.com/${GITHUB_REPOSITORY:?}/${1:?}/package.json"|jq -r .config.projects.chrome.tag; }
+          chromium_ver() {
+              gh api -H "Accept: application/vnd.github.raw+json" "https://api.github.com/repos/${GITHUB_REPOSITORY:?}/contents/package.json?ref=${1:?}"|jq -r .config.projects.chrome.tag
+          }
 
           pr_ver="$(chromium_ver "${PR_SHA:?}")"
-          target_ver="$(chromium_ver "${TARGET_SHA:?}")"
+          target_ver="$(chromium_ver "${GITHUB_BASE_REF:?}")"
 
           echo "::notice::PR branch: ${GITHUB_HEAD_REF:?} (${pr_ver:?}), target branch: ${GITHUB_BASE_REF:?} (${target_ver:?})"
 
           if [[ "${pr_ver%%.*}" != "${target_ver%%.*}" ]]; then
-              # TODO: Some $(chromium_ver "$GITHUB_BASE_REF") calls in compare-chromium-versions get a stale version.
-              # Seems random, could be a caching issue at GitHub, let's try to sleep as a workaround.
-              sleep 30
-
               echo "::notice::Rerunning compare-chromium-versions in PRs targeting ${GITHUB_BASE_REF:?}"
               while read -r pr_number head_sha; do
                   run_id="$(gh api "/repos/$GITHUB_REPOSITORY/actions/workflows/compare-chromium-versions.yml/runs?head_sha=${head_sha:?}" -q '.workflow_runs[0].id')"