diff --git a/poky/meta/classes/buildhistory.bbclass b/poky/meta/classes/buildhistory.bbclass
index 40b292b..796f68c 100644
--- a/poky/meta/classes/buildhistory.bbclass
+++ b/poky/meta/classes/buildhistory.bbclass
@@ -519,12 +519,14 @@
 
 buildhistory_list_files() {
 	# List the files in the specified directory, but exclude date/time etc.
-	# This awk script is somewhat messy, but handles where the size is not printed for device files under pseudo
+	# This is somewhat messy, but handles where the size is not printed for device files under pseudo
+	( cd $1
+	find_cmd='find . ! -path . -printf "%M %-10u %-10g %10s %p -> %l\n"'
 	if [ "$3" = "fakeroot" ] ; then
-		( cd $1 && ${FAKEROOTENV} ${FAKEROOTCMD} find . ! -path . -printf "%M %-10u %-10g %10s %p -> %l\n" | sort -k5 | sed 's/ * -> $//' > $2 )
+		eval ${FAKEROOTENV} ${FAKEROOTCMD} $find_cmd
 	else
-		( cd $1 && find . ! -path . -printf "%M %-10u %-10g %10s %p -> %l\n" | sort -k5 | sed 's/ * -> $//' > $2 )
-	fi
+		eval $find_cmd
+	fi | sort -k5 | sed 's/ * -> $//' > $2 )
 }
 
 buildhistory_list_pkg_files() {
@@ -670,12 +672,29 @@
     statusheader = d.getVar('BUILDCFG_HEADER')
     return('\n%s\n%s\n' % (statusheader, '\n'.join(statuslines)))
 
+def buildhistory_get_modified(path):
+    # copied from get_layer_git_status() in image-buildinfo.bbclass
+    import subprocess
+    try:
+        subprocess.check_output("""cd %s; export PSEUDO_UNLOAD=1; set -e;
+                                git diff --quiet --no-ext-diff
+                                git diff --quiet --no-ext-diff --cached""" % path,
+                                shell=True,
+                                stderr=subprocess.STDOUT)
+        return ""
+    except subprocess.CalledProcessError as ex:
+        # Silently treat errors as "modified", without checking for the
+        # (expected) return code 1 in a modified git repo. For example, we get
+        # output and a 129 return code when a layer isn't a git repo at all.
+        return " -- modified"
+
 def buildhistory_get_metadata_revs(d):
     # We want an easily machine-readable format here, so get_layers_branch_rev isn't quite what we want
     layers = (d.getVar("BBLAYERS") or "").split()
-    medadata_revs = ["%-17s = %s:%s" % (os.path.basename(i), \
+    medadata_revs = ["%-17s = %s:%s%s" % (os.path.basename(i), \
         base_get_metadata_git_branch(i, None).strip(), \
-        base_get_metadata_git_revision(i, None)) \
+        base_get_metadata_git_revision(i, None), \
+        buildhistory_get_modified(i)) \
             for i in layers]
     return '\n'.join(medadata_revs)
 
@@ -896,7 +915,7 @@
             if orig_srcrev != 'INVALID':
                 f.write('# SRCREV = "%s"\n' % orig_srcrev)
             if len(srcrevs) > 1:
-                for name, srcrev in srcrevs.items():
+                for name, srcrev in sorted(srcrevs.items()):
                     orig_srcrev = d.getVar('SRCREV_%s' % name, False)
                     if orig_srcrev:
                         f.write('# SRCREV_%s = "%s"\n' % (name, orig_srcrev))
@@ -904,7 +923,7 @@
             else:
                 f.write('SRCREV = "%s"\n' % next(iter(srcrevs.values())))
             if len(tag_srcrevs) > 0:
-                for name, srcrev in tag_srcrevs.items():
+                for name, srcrev in sorted(tag_srcrevs.items()):
                     f.write('# tag_%s = "%s"\n' % (name, srcrev))
                     if name in old_tag_srcrevs and old_tag_srcrevs[name] != srcrev:
                         pkg = d.getVar('PN')