lib/PublicInbox/Import.pm | 2 ++

diff --git a/lib/PublicInbox/Import.pm b/lib/PublicInbox/Import.pm
index b25427ee552628237bc094225f2daf24e98dcdac..250a2db31e979054c94df5a0e1dd6ca2d8a5f883 100644
--- a/lib/PublicInbox/Import.pm
+++ b/lib/PublicInbox/Import.pm
@@ -440,6 +440,8 @@
 	_update_git_info($self, 1) if delete $self->{nchg};
 
 	$self->lock_release;
+
+	$self->{git}->cleanup;
 }
 
 sub atfork_child {