Describe the bug
The scanner defined in gitscanner_log.go freezes on s.r.ReadString if git log receives an error through stderr. This only happens on Windows and cannot be reproduced on macOS. I've tried to come up with a fix myself, but I am puzzled why this is happening, as I am not that familiar with go. My guess is that the stderr buffer of cmd is running full but I am not sure.

To Reproduce
Took me quite some time to come up with a 100% reproduction. I have created a shell script that creates a test repo on GitHub using the CLI and that creates a corrupted .gitattributes file so that an error is printed on git log. So far, we had 2 different users stumbling upon and reporting this issue, so I guess it might happen quite often. In essence, the script is doing the following:

1. Create a repo on GH and clone it
2. Create a .dat file and track it with LFS
3. Append many bad lines to the .gitattributes (to provoke a long stderr)
4. Push to GitHub
5. Invoke prune with some config (see attached shell script) and observe a freeze on Windows

See (and maybe run) attached issue.sh. Note: The script requires gh cli and will create and delete a test repository on your GitHub account.

Expected behavior
The script should not freeze, but print "prune done". Of course, this is user error due to a corrupted .gitattributes file being committed, but git LFS should not break because of this. Also, I guess there might be other scenarios where errors are printed on git log causing logscanner to freeze in LFS.

System environment
Windows 11

Output of git lfs env

git-lfs/3.4.1 (GitHub; windows amd64; go 1.20.11; git 0898dcbc)
git version 2.44.0.windows.1

LocalWorkingDir=
LocalGitDir=
LocalGitStorageDir=
LocalMediaDir=lfs\objects
LocalReferenceDirs=
TempDir=lfs\tmp
ConcurrentTransfers=8
TusTransfers=false
BasicTransfersOnly=false
SkipDownloadErrors=false
FetchRecentAlways=false
FetchRecentRefsDays=7
FetchRecentCommitsDays=0
FetchRecentRefsIncludeRemotes=true
PruneOffsetDays=3
PruneVerifyRemoteAlways=false
PruneRemoteName=origin
LfsStorageDir=lfs
AccessDownload=none
AccessUpload=none
DownloadTransfers=basic,lfs-standalone-file,ssh
UploadTransfers=basic,lfs-standalone-file,ssh
GIT_EXEC_PATH=C:/Program Files/Git/mingw64/libexec/git-core
git config filter.lfs.process = "git-lfs filter-process"
git config filter.lfs.smudge = "git-lfs smudge -- %f"
git config filter.lfs.clean = "git-lfs clean -- %f"