Reinitialize index on "Object not found" error.

Author: ehuss

src/cargo/sources/git/utils.rs

@@ -953,7 +953,8 @@ pub fn fetch(
  };
  debug!("fetch failed: {}", err);
 
- if !repo_reinitialized && err.class() == git2::ErrorClass::Reference {
+ if !repo_reinitialized && matches!(err.class(), ErrorClass::Reference | ErrorClass::Odb)
+ {
  repo_reinitialized = true;
  debug!(
  "looks like this is a corrupt repository, reinitializing \