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Versioning
By default, x-amz-copy-source identifies the latest version of an
object to copy. (If the latest version is a Delete Marker, Amazon S3 behaves as if the
object was deleted.) To copy a different version, use the
versionId subresource.
If you enable Versioning on the target bucket, Amazon S3 generates a unique version ID
for the object being copied. This version ID is different from the version ID of the
source object. Amazon S3 returns the version ID of the copied object in the x-amz-version-id response header in the response.
If you do not enable versioning or suspend it on the target bucket, the version ID Amazon S3
generates is always null.
To see sample requests that use versioning, see Sample Request: Copying a specified version of an object.
