Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
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