[CI] Print out the mismatched commit in ci

[jjyao]

Why are these changes needed?

Related issue number

Checks

• I've run scripts/format.sh to lint the changes in this PR.
• I've included any doc changes needed for https://docs.ray.io/en/master/.
• I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/
• Testing Strategy
  • Unit tests
  • Release tests
  • This PR is not tested :(

[rkooo567]

Before merging this, can you run some tests locally with this PR? Maybe try cherry-picking it with 1.7 and test it?

[krfricke]

I merged this since it only adds a print to the assertion, i.e. behavior is basically the same as before

[jjyao]

Yea, I tested it locally and the cmd it builds works correctly.

[rkooo567]

Makes sense!