If your source tree is complicated and multiple branches are in use, it can often be difficult to quickly determine which tagged builds contain a specific commit. Did this fix go to the beta branch? Did it make it into 0.9.54, or was it 0.9.55?
Here's the git command you need:
$ git tag --contains a5b49f9 0.9.324 beta.40 beta.41 release.2