Improve loading speed of commits and reflog when log.showSignature=true

[Ryooooooga]

Loading speed of commits and reflog is very slow when log.showSignature=true.

maybe related to #1901 (I couldn't reproduce the panic)

[jesseduffield]

Nice work, few things:

1. At first I thought this might get in the way of Show GPG signature indicator in Commits #1897 but looking here it seems that the git log formatter allows for showing gpg status so this should be fine
2. do we need to actually pass the -c arg or can we just go --show-signature=false
3. does this require a particular git version to work?
4. We're still calling canExtractCommit from getHydratedRebasingCommits. I assume that method should be updated as well?

[Ryooooooga]

2. do we need to actually pass the -c arg or can we just go --show-signature=false
3. does this require a particular git version to work?

I did not know about --show-signature.
--no-show-signature flag is only available in Git 2.10.0 or later (-c log.showSignature=false is available in any version).

$ docker run --rm -it -v "$PWD:/app" ryooooooga/git:2.9.5 -C /app log --no-show-signature
fatal: unrecognized argument: --no-show-signature

$ docker run --rm -it -v "$PWD:/app" ryooooooga/git:2.9.5 -C /app -c log.showSignature=false log
commit 2144fefee9abb434c70eea7a83bbac96a71e8cb0
Author: Ryooooooga <eial5q265e5@gmail.com>
Date:   Fri May 6 22:25:12 2022 +0900
...

4. We're still calling canExtractCommit from getHydratedRebasingCommits. I assume that method should be updated as well?

canExtractCommit could be removed in the same way.

[jesseduffield]

--no-show-signature flag is only available in Git 2.10.0 or later

Ah okay, fair enough

[jesseduffield]

Nice one