Finding a commit by tag is a bit difficult because git and svn treat tags differently. In svn, tags are classified the same way branches are. In Git, tags are a reference to a commit.
<rdar://problem/70700121>
Created attachment 412363 [details] Patch
Committed r269117: <https://trac.webkit.org/changeset/269117> All reviewed patches have been landed. Closing bug and clearing flags on attachment 412363 [details].