lib/PublicInbox/GitAsyncCat.pm | 8 ++++++++

diff --git a/lib/PublicInbox/GitAsyncCat.pm b/lib/PublicInbox/GitAsyncCat.pm
index b32c2fd3cab4b6c665df483378b01f42952102c6..2d601542964224de7c1d4fc630eda40929e50386 100644
--- a/lib/PublicInbox/GitAsyncCat.pm
+++ b/lib/PublicInbox/GitAsyncCat.pm
@@ -45,6 +45,12 @@ 		$self->close;
 	}
 }
 
+sub git_tmp_cleanup {
+	my ($git) = @_;
+	$git->cleanup(1) and
+		PublicInbox::DS::add_timer(3, \&git_tmp_cleanup, $git);
+}
+
 sub ibx_async_cat ($$$$) {
 	my ($ibx, $oid, $cb, $arg) = @_;
 	my $git = $ibx->{git} // $ibx->git;
@@ -63,6 +69,8 @@ 		$git->cat_async($oid, $cb, $arg);
 		$git->{async_cat} //= do {
 			my $self = bless { git => $git }, __PACKAGE__;
 			$git->{in}->blocking(0);
+			$git->{-tmp} and PublicInbox::DS::add_uniq_timer(
+						3, \&git_tmp_cleanup, $git);
 			$self->SUPER::new($git->{in}, EPOLLIN|EPOLLET);
 			\undef; # this is a true ref()
 		};