Steps to reproduce the issue:

$ git config --get core.autocrlf
$ go test ./pkg/gitutils

Tested with 4a7715c

Describe the results you received:

failure message:

--- FAIL: TestCheckoutGit (0.04s)
        gitutils_test.go:201: Expected FROM scratch
                EXPOSE 5000, was FROM scratch
                EXPOSE 5000
FAIL

Describe the results you expected:
It should not fail.

Additional information you deem important (e.g. issue happens only occasionally)

• Found in PR hack/make/test-unit: support coverprofile #22930, which is an attempt to simplify go test in hack/*. The PR uses env -i for test-unit as well as for test-integration, so it disables some git-related environment variable.
• The cause of the issue is obvious: eol is not properly set : https://github.com/docker/docker/blob/4a7715c9783627ecc194dac8502a684f40a9d0bd/pkg/gitutils/gitutils_test.go#L80