Is there a way to get the "format-patch" formatted file name?

Hi,

My typical use case is to download patches from GH, e.g.:

~~~

$ curl -OL https://github.com/rails/sprockets/pull/791.patch
   % Total    % Received % Xferd  Average Speed   Time    Time Time  Current
                                  Dload  Upload   Total   Spent Left  Speed
   0     0    0     0    0     0      0      0 --:--:-- --:--:-- 
--:--:--     0
100 12717    0 12717    0     0  21765      0 --:--:-- --:--:-- --:--:-- 
58603

~~~

The problem with this is that I end up with the "791.patch" file, while I'd like have a file with similar name as if I have used the git command:

~~~

$ git format-patch -1 6554b6d 0001-Fix-Minitest-constant-name-in-tests.patch

~~~

So I wonder, is there a way to get such file name?

The basic use case which would be enough for me would be to obtain the string:

~~~

$ head -4 791.patch | tail -1
Subject: [PATCH] Fix Minitest constant name in tests
~~~

and then use something like:

~~~

$ echo "Fix Minitest constant name in tests" | git sanitize-string-into-filename

Fix-Minitest-constant-name-in-tests

~~~

Of course I can imagine something more fancy such as:

~~~

$ git extract-filenames-from-patch 791.patch

0001-Fix-Minitest-constant-name-in-tests.patch

~~~

IOW, I'd like if the `fmt_output_subject` method (if that is the right one):

https://github.com/git/git/blob/6e8611e90a629e38da1e7c0e1f986bc6ec23a330/log-tree.c#L388

was more user exposed.

Of course I could put some script like this together myself, but I think that Git already has all the pluming.

Thank you in advance

Vít

P.S.: Please keep me in the CC, because I am not subscribed to this ML