passed_ci.sh

#!/bin/bash

echo -n "Enter merge commit: "
read merge_sha

echo -n "Enter last known passing commit: "
read ci_sha

git merge-base --is-ancestor $merge_sha $ci_sha

if [ $? -eq 0 ]; then
  echo "Commit $merge_sha passed CI in $ci_sha"
else
  echo "Commit $merge_sha has not passed CI yet"
fi