I've found another instance of a missing info for a commit hash.

This commit is found: https://pdfium.googlesource.com/pdfium/+/5fe886fd17a413b39214ffdd7b2fba5326b88011

but the one after it isn't:
https://pdfium.googlesource.com/pdfium/+/2ebef1487e139dfe1f44998f312ed59f80202c82

thanks!