Git fetch Failure

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Please answer the following questions to help us understand your issue.

What did you do before the bug happened? (Steps to reproduce your issue)

I am trying to clone the repo from cmdline. the same steps succeeds with git v2.50.1 but fails with git v 2.51.0

repro steps

mkdir TasksTest

cd TasksTest

git init

git remote add origin https://github.com/microsoft/azure-pipelines-tasks.git

git fetch

What did you expect to happen? (Expected behavior)

Git fetch to succeed

What happened instead? (Actual behavior)

Git fetch failed with error

error: cannot lock ref 'refs/remotes/origin/users/ajya/sqlservermoduleimportM146': Unable to create '/Users/admin/Repos/tasks1/.git/refs/remotes/origin/users/ajya/sqlservermoduleimportM146.lock': File exists.

Another git process seems to be running in this repository, e.g.

an editor opened by 'git commit'. Please make sure all processes

are terminated then try again. If it still fails, a git process

may have crashed in this repository earlier:

remove the file manually to continue.

What's different between what you expected and what actually happened?

Anything else you want to add:

Please review the rest of the bug report below.

You can delete any lines you don't wish to share.

[System Info]

git version:

git version 2.51.0

cpu: arm64

no commit associated with this build

sizeof-long: 8

sizeof-size_t: 8

shell-path: /bin/sh

feature: fsmonitor--daemon

libcurl: 8.7.1

zlib: 1.2.12

SHA-1: SHA1_DC

SHA-256: SHA256_BLK

default-ref-format: files

default-hash: sha1

uname: Darwin 24.6.0 Darwin Kernel Version 24.6.0: Mon Jul 14 11:30:29 PDT 2025; root:xnu-11417.140.69~1/RELEASE_ARM64_T6000 arm64

compiler info: clang: 17.0.0 (clang-1700.0.13.3)

libc info: no libc information available

$SHELL (typically, interactive shell): /bin/zsh

[Enabled iHooks]