WPT nightly sync is broken

[jdm]

Switched to a new branch 'wpt_update'
 7:17.98 vcs ERROR fatal: bad object f2282e8294bb649c075b273f373423f9b215a16c

Error running mach:

    ['update-wpt', '--sync', '--no-upstream', '--patch']

The error occurred in code that was called by the mach command. This is either
a bug in the called code itself or in the way that mach is calling it.

You should consider filing a bug for this issue.

If filing a bug, please include the full output of mach, including this error
message.

The details of the failure are as follows:

CalledProcessError: Command '['git', 'show', '-s', '--format=format:%an\n%ae\n%B', 'f2282e8294bb649c075b273f373423f9b215a16c']' returned non-zero exit status 128

  File "/Users/servo/buildbot/slave/mac-nightly/build/python/servo/testing_commands.py", line 479, in update_wpt
    return run_globals["update_tests"](**kwargs)
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/update.py", line 25, in update_tests
    rv = update.run_update(logger, **kwargs)
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/update/__init__.py", line 26, in run_update
    return updater.run()
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/update/update.py", line 180, in run
    rv = update_runner.run()
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/update/base.py", line 61, in run
    rv = step(self.logger).run(step_index, self.state)
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/update/base.py", line 32, in run
    self.create(state)
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/update/update.py", line 75, in create
    runner.run()
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/update/base.py", line 61, in run
    rv = step(self.logger).run(step_index, self.state)
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/update/base.py", line 32, in run
    self.create(state)
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/update/sync.py", line 128, in create
    state.sync["branch"])
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/update/tree.py", line 252, in get_remote_sha1
    return self.commit_cls(self, sha1)
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/update/tree.py", line 392, in __init__
    self.author, self.email, self.message = self._get_meta()
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/update/tree.py", line 404, in _get_meta
    author, email, message = self.git("show", "-s", "--format=format:%an\n%ae\n%B", self.sha1).split("\n", 2)
  File "/Users/servo/buildbot/slave/mac-nightly/build/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/vcs.py", line 36, in inner
    return func(command_line, stderr=subprocess.STDOUT, **proc_kwargs)
  File "/usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 223, in check_output
    raise CalledProcessError(retcode, cmd, output=output)
fatal: No such remote: sync-fork
HEAD is now at 834d3193a2 Auto merge of #21780 - jdm:ndk15upgrade, r=asajeffrey
Switched to branch 'master'

[jdm]

This started on april 30.