merge(3p/git): Merge git upstream at v2.26.2

third_party/git/git-gui/lib/branch.tcl

@@ -8,6 +8,7 @@ proc load_all_heads {} {
 	set rh_len [expr {[string length $rh] + 1}]
 	set all_heads [list]
 	set fd [git_read for-each-ref --format=%(refname) $rh]
+	fconfigure $fd -translation binary -encoding utf-8
 	while {[gets $fd line] > 0} {
 		if {!$some_heads_tracking || ![is_tracking_branch $line]} {
 			lappend all_heads [string range $line $rh_len end]
@@ -24,6 +25,7 @@ proc load_all_tags {} {
 		--sort=-taggerdate \
 		--format=%(refname) \
 		refs/tags]
+	fconfigure $fd -translation binary -encoding utf-8
 	while {[gets $fd line] > 0} {
 		if {![regsub ^refs/tags/ $line {} name]} continue
 		lappend all_tags $name