Fix devel updates

Commit 474cc56f8d refactored the
getCommit() function to use the standard passToGit() and capture()
functions.

Unlike every other external call, here we use .Wait() and kill the
command after 5 seconds. This was missed and ended up breaking the
function.

So instead don't use capture but the manual .Wait() call. passToGit() is
still used.

vcs.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"os"
@@ -134,9 +135,13 @@ func updateVCSData(pkgName string, sources []gosrc.ArchString) {
 
 func getCommit(url string, branch string, protocols []string) string {
 	for _, protocol := range protocols {
-		cmd := passToGit("ls-remote", protocol+"://"+url, branch)
+		var outbuf bytes.Buffer
+
+		cmd := passToGit("", "ls-remote", protocol+"://"+url, branch)
+		cmd.Stdout = &outbuf
 		cmd.Env = append(os.Environ(), "GIT_TERMINAL_PROMPT=0")
-		stdout, _, err := capture(cmd)
+
+		err := cmd.Start()
 		if err != nil {
 			continue
 		}
@@ -155,6 +160,7 @@ func getCommit(url string, branch string, protocols []string) string {
 			continue
 		}
 
+		stdout := outbuf.String()
 		split := strings.Fields(stdout)
 
 		if len(split) < 2 {