2026-01-05T18:59:52.3865363Z ##[section]Starting: Checkout dotnet/sdk@refs/pull/51158/merge to s
2026-01-05T18:59:52.3959443Z ==============================================================================
2026-01-05T18:59:52.3960019Z Task         : Get sources
2026-01-05T18:59:52.3960258Z Description  : Get sources from a repository. Supports Git, TfsVC, and SVN repositories.
2026-01-05T18:59:52.3960389Z Version      : 1.0.0
2026-01-05T18:59:52.3960565Z Author       : Microsoft
2026-01-05T18:59:52.3960831Z Help         : [More Information](https://go.microsoft.com/fwlink/?LinkId=798199)
2026-01-05T18:59:52.3960932Z ==============================================================================
2026-01-05T18:59:52.8337260Z Syncing repository: dotnet/sdk (GitHub)
2026-01-05T18:59:52.8870995Z Prepending Path environment variable with directory containing 'git.exe'.
2026-01-05T18:59:52.8927530Z ##[command]git version
2026-01-05T18:59:53.2423352Z git version 2.50.1.windows.1
2026-01-05T18:59:53.2483761Z ##[command]git lfs version
2026-01-05T18:59:53.4412691Z git-lfs/3.4.0 (GitHub; windows amd64; go 1.20.6; git d06d6e9e)
2026-01-05T18:59:53.4490959Z ##[command]git init "D:\a\_work\1\s"
2026-01-05T18:59:53.7283617Z Initialized empty Git repository in D:/a/_work/1/s/.git/
2026-01-05T18:59:53.7336965Z ##[command]git remote add origin https://github.com/dotnet/sdk
2026-01-05T18:59:53.7966789Z ##[command]git sparse-checkout disable
2026-01-05T18:59:53.8652578Z ##[command]git config gc.auto 0
2026-01-05T18:59:53.9250702Z ##[command]git config core.longpaths true
2026-01-05T18:59:53.9408414Z ##[command]git config --get-all http.https://github.com/dotnet/sdk.extraheader
2026-01-05T18:59:54.0118850Z ##[command]git config --get-all http.extraheader
2026-01-05T18:59:54.0855000Z ##[command]git config --get-regexp .*extraheader
2026-01-05T18:59:54.1440868Z ##[command]git config --get-all http.proxy
2026-01-05T18:59:54.2056316Z ##[command]git config http.version HTTP/1.1
2026-01-05T18:59:54.2746679Z ##[command]git config --get-all remote.origin.promisor
2026-01-05T18:59:54.3330130Z ##[command]git config --get-all remote.origin.partialclonefilter
2026-01-05T18:59:54.3969999Z ##[command]git --config-env=http.extraheader=env_var_http.extraheader fetch --force --tags --prune --prune-tags --progress --no-recurse-submodules origin   +refs/heads/*:refs/remotes/origin/* +refs/pull/51158/merge:refs/remotes/pull/51158/merge
2026-01-05T18:59:55.1368403Z fatal: couldn't find remote ref refs/pull/51158/merge
2026-01-05T18:59:55.2094526Z ##[warning]Git fetch failed with exit code 128, back off 2.638 seconds before retry.
2026-01-05T18:59:57.7836588Z ##[command]git --config-env=http.extraheader=env_var_http.extraheader fetch --force --tags --prune --prune-tags --progress --no-recurse-submodules origin   +refs/heads/*:refs/remotes/origin/* +refs/pull/51158/merge:refs/remotes/pull/51158/merge
2026-01-05T18:59:58.2294560Z fatal: couldn't find remote ref refs/pull/51158/merge
2026-01-05T18:59:58.2529820Z ##[warning]Git fetch failed with exit code 128, back off 4.596 seconds before retry.
2026-01-05T19:00:02.8304742Z ##[command]git --config-env=http.extraheader=env_var_http.extraheader fetch --force --tags --prune --prune-tags --progress --no-recurse-submodules origin   +refs/heads/*:refs/remotes/origin/* +refs/pull/51158/merge:refs/remotes/pull/51158/merge
2026-01-05T19:00:03.3001475Z fatal: couldn't find remote ref refs/pull/51158/merge
2026-01-05T19:00:03.3186875Z ##[error]Git fetch failed with exit code: 128
2026-01-05T19:00:03.3990461Z ##[section]Finishing: Checkout dotnet/sdk@refs/pull/51158/merge to s