Finding a commit based on the diff index line?

Hi,

I'm curating some of my old patch series (i.e. doing some tidying up) and 
I'm trying to determine the commits that generated some of my patches so 
that I can see if I still have them after they were rebased (a 'name that 
dangling branch' problem).

Is there an easy way of finding the commit sha1 that contains the given diff 
index line.

For example.
index fa05269..57033dd 100755
or
index 8ebcded..d9ab360 100644

which both should get back to Jeff King's 36d6792 (t0006: test various date 
formats, 2016-06-20).

It feels like it is something that should already possible without a 
mini-script. We have the rev range which should limit the range to a single 
commit, though if random blob revs were given the commit range would be 
'scattered'.


Is there a simple quick way of achieving this?

--
Philip