[MacPorts] #56151: valgrind-devel @3.14.0-r2017-11-21: fails to install because git repository no longer has commit

[MacPorts]

#56151: valgrind-devel @3.14.0-r2017-11-21: fails to install because git repository
no longer has commit
-----------------------------+----------------------
  Reporter:  jpwhiting       |      Owner:  raimue
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.4.2
Resolution:                  |   Keywords:
      Port:  valgrind-devel  |
-----------------------------+----------------------

Comment (by kencu):

 I noticed a similar error last night when trying to update valgrind-devel
 to the latest commit. I didn't try the existing version (which I already
 had installed).

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Ticket URL: <https://trac.macports.org/ticket/56151#comment:2>
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