Copy Oids that we get from the UpdateTipsCallback after a fetch
Copy Oids that we get from the UpdateTipsCallback after a fetch

This is an attempt to fix [#133463549] where we're trying to find
commits from other repositories. We suspect that this is due to libgit2
reusing the same memory location for Oids in a loop.

Signed-off-by: Adam Berkovec <561a1aa9cd22ff35a4cd9f01778138c4df0df67b@pivotal.io>

pivotal-cf/cred-alert,pivotal-cf/cred-alert