Some systems show "Thu Jan 01" instead of "Thu Jan 1", which breaks tests.
Using "1000000" yields "Mon Jan 12 13:46:40 1970", which looks the same on
all systems.
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Actually warn on pulling from an unrelated repository
add some comments to findincoming
track the base nodes of the fetch set
report if the base set only contains nullid
add a test case
manifest hash: 3fc038a6041b0967a20503f5ec8876efc038841a
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