Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [error: last command exited with $?=1
not ok 4 - do partial clone 2, backfill min batch size
#	
#		git clone --no-checkout --filter=blob:none	\
#			--single-branch --branch=main 		\
#			"file://$(pwd)/srv.bare" backfill2 &&
#	
#		GIT_TRACE2_EVENT="$(pwd)/batch-trace" git \
#			-C backfill2 backfill --min-batch-size=20 &&
#	
#		# Batches were used
#		test_trace2_data promisor fetch_count 20 <batch-trace >matches &&
#		test_line_count = 2 matches &&
#		test_trace2_data promisor fetch_count 8 <batch-trace &&
#	
#		# No more missing objects!
#		git -C backfill2 rev-list --quiet --objects --missing=print HEAD >revs2 &&
#		test_line_count = 0 revs2
#	]: [This snippet shows why the build has failed]

Issue: Because test t5620.4 has failed.
Resolution: Work with the upstream code to create a solution for the failing test or if the situation permits add an exemption to not run this test on certain architectures or not run the test at all.