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1af09069f7
If the S3 bucket used to house a repo has KMS encryption enabled then the etag of an object may not match the MD5 of the file. This may cause an incorrect error to be reported stating the file already exists and is different. A mechanism exists to work around this issue by using the MD5 stored in object metadata. This check doesn't always cover the case where KMS is enabled as the fallback is only used if the etag is not 32 characters long. This commit changes the fallback mechanism so that it is used in any case where the object's etag does not match the source MD5. This will incur a performance penalty of an extra head request for each object with a mismatch.