diff -ur coreutils-8.5.orig/src/chroot.c coreutils-8.5/src/chroot.c
--- coreutils-8.5.orig/src/chroot.c	2010-04-20 21:52:04.000000000 +0200
+++ coreutils-8.5/src/chroot.c	2011-07-07 15:29:47.000000000 +0200
@@ -21,6 +21,7 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <grp.h>
+#include <sys/syscall.h>
 
 #include "system.h"
 #include "error.h"
@@ -37,16 +38,22 @@
 # define MAXGID GID_T_MAX
 #endif
 
+#ifndef CLONE_NEWUTS
+# define CLONE_NEWUTS	0x04000000
+#endif
+
 enum
 {
   GROUPS = UCHAR_MAX + 1,
-  USERSPEC
+  USERSPEC,
+  HOSTNAME
 };
 
 static struct option const long_opts[] =
 {
   {"groups", required_argument, NULL, GROUPS},
   {"userspec", required_argument, NULL, USERSPEC},
+  {"hostname", required_argument, NULL, HOSTNAME},
   {GETOPT_HELP_OPTION_DECL},
   {GETOPT_VERSION_OPTION_DECL},
   {NULL, 0, NULL, 0}
@@ -132,6 +139,7 @@
       fputs (_("\
   --userspec=USER:GROUP  specify user and group (ID or name) to use\n\
   --groups=G_LIST        specify supplementary groups as g1,g2,..,gN\n\
+  --hostname=HOSTNAME    specify a different hostname\n\
 "), stdout);
 
       fputs (HELP_OPTION_DESCRIPTION, stdout);
@@ -151,6 +159,7 @@
   int c;
   char const *userspec = NULL;
   char const *groups = NULL;
+  char const *hostname = NULL;
 
   initialize_main (&argc, &argv);
   set_program_name (argv[0]);
@@ -173,6 +182,10 @@
           groups = optarg;
           break;
 
+        case HOSTNAME:
+          hostname = optarg;
+          break;
+
         case_GETOPT_HELP_CHAR;
 
         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
@@ -188,6 +201,18 @@
       usage (EXIT_CANCELED);
     }
 
+  if (hostname)
+    {
+      // Use 'syscall' instead of unshare incase glibc doesn't have it.
+      // unshare(CLONE_NEWUTS);
+      if (syscall(__NR_unshare, CLONE_NEWUTS))
+        error (EXIT_CANCELED, errno, _("new utsname namespace failed"));
+
+      if (sethostname(hostname, strlen(hostname)+1))
+        error (EXIT_CANCELED, errno, _("set hostname failed"));
+    }
+
+
   if (chroot (argv[optind]) != 0)
     error (EXIT_CANCELED, errno, _("cannot change root directory to %s"),
            argv[optind]);