Repository: go
Issue: x/mod/zip: TestVCS failures
Labels: NeedsInvestigation

```
#!watchflakes
default <- pkg == "golang.org/x/mod/zip" && test == "TestVCS"
```

Issue created automatically to collect these failures.

Example ([log](https://build.golang.org/log/c3a75067920e5e02e4fd0eb0a16893331f4e7838)):

    --- FAIL: TestVCS (0.00s)
        --- FAIL: TestVCS/rsc.io_quote@v1.5.3-pre1 (10.31s)
            zip_test.go:1328: /usr/bin/git init --bare
            zip_test.go:1345: /usr/bin/git remote add origin -- https://github.com/rsc/quote
            zip_test.go:1354: exit status 128: /usr/bin/git fetch -f --depth=1 origin refs/tags/v1.5.3-pre1:refs/tags/v1.5.3-pre1
                19:59:06.935783 http.c:756              == Info: Couldn't find host github.com in the .netrc file; using defaults
                19:59:06.937184 http.c:756              == Info:   Trying 140.82.114.3:443...
                19:59:06.961559 http.c:756              == Info: Connected to github.com (140.82.114.3) port 443 (#0)
                19:59:06.994703 http.c:756              == Info: found 387 certificates in /etc/ssl/certs
                19:59:06.994796 http.c:756              == Info: ALPN, offering h2
    ...
        --- FAIL: TestVCS/rsc.io_quote@v1.3.0 (10.38s)
            zip_test.go:1328: /usr/bin/git init --bare
            zip_test.go:1345: /usr/bin/git remote add origin -- https://github.com/rsc/quote
            zip_test.go:1354: exit status 128: /usr/bin/git fetch -f --depth=1 origin refs/tags/v1.3.0:refs/tags/v1.3.0
                19:59:06.929088 http.c:756              == Info: Couldn't find host github.com in the .netrc file; using defaults
                19:59:06.932098 http.c:756              == Info:   Trying 140.82.113.4:443...
                19:59:06.956469 http.c:756              == Info: Connected to github.com (140.82.113.4) port 443 (#0)
                19:59:06.988868 http.c:756              == Info: found 387 certificates in /etc/ssl/certs
                19:59:06.988951 http.c:756              == Info: ALPN, offering h2
                19:59:06.988957 http.c:756              == Info: ALPN, offering http/1.1
    ...
                19:59:17.160911 http.c:703              <= Recv header, 0000000021 bytes (0x00000015)
                19:59:17.160913 http.c:715              <= Recv header: x-xss-protection: 0
                19:59:17.160915 http.c:703              <= Recv header, 0000000072 bytes (0x00000048)
                19:59:17.160916 http.c:715              <= Recv header: content-security-policy: default-src 'none'; style-src 'unsafe-inline'
                19:59:17.160918 http.c:703              <= Recv header, 0000000002 bytes (0x00000002)
                19:59:17.160920 http.c:715              <= Recv header:
                19:59:17.160941 http.c:756              == Info: Connection #0 to host github.com left intact
                error: RPC failed; HTTP 400 curl 22 The requested URL returned error: 400
                fatal: error reading section header 'shallow-info'
            zip_test.go:1223: failed to download zip from repository (repeated failure): exit status 128


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