Remove --clamp-mtime option on tar of el7.

dpkg-clamp-mtime.patch

@@ -0,0 +1,29 @@
+clamp-mtime only available in tar 1.28 but we may distar it in epel7
+
+
+man tar
+      --clamp-mtime
+              Only set time when the file is more recent than what was given with --mtime.
+
+--- ./scripts/Dpkg/Source/Archive.pm.orig	2018-09-23 14:50:58.650262327 +0100
++++ ./scripts/Dpkg/Source/Archive.pm	2018-09-23 14:51:10.640395035 +0100
+@@ -52,7 +52,7 @@ sub create {
+     # Call tar creation process
+     $spawn_opts{delete_env} = [ 'TAR_OPTIONS' ];
+     $spawn_opts{exec} = [ $Dpkg::PROGTAR, '-cf', '-', '--format=gnu', '--sort=name',
+-                          '--mtime', "\@$mtime", '--clamp-mtime', '--null',
++                          '--mtime', "\@$mtime", '--null',
+                           '--numeric-owner', '--owner=0', '--group=0',
+                           @{$opts{options}}, '-T', '-' ];
+     *$self->{pid} = spawn(%spawn_opts);
+--- ./dpkg-deb/build.c.orig	2018-09-23 14:50:06.952690066 +0100
++++ ./dpkg-deb/build.c	2018-09-23 14:50:22.771865176 +0100
+@@ -450,7 +450,7 @@ tarball_pack(const char *dir, filenames_
+ 
+     command_init(&cmd, TAR, "tar -cf");
+     command_add_args(&cmd, "tar", "-cf", "-", "--format=gnu",
+-                           "--mtime", mtime, "--clamp-mtime", NULL);
++                           "--mtime", mtime, NULL);
+     /* Mode might become a positional argument, pass it before -T. */
+     if (mode)
+       command_add_args(&cmd, "--mode", mode, NULL);

dpkg.spec

@@ -17,6 +17,7 @@ URL:            https://tracker.debian.org/pkg/dpkg
 Source0:        http://ftp.debian.org/debian/pool/main/d/dpkg/%{name}_%{version}.tar.xz
 Patch1:         dpkg-fix-logrotate.patch
 Patch2:         dpkg-perl-libexecdir.epel6.patch
+Patch3:         dpkg-clamp-mtime.patch
 
 BuildRequires:  gcc-c++
 BuildRequires:  zlib-devel bzip2-devel libselinux-devel gettext ncurses-devel
@@ -165,6 +166,10 @@ user interfaces.
 %if 0%{?rhel} && 0%{?rhel} < 7
 %patch2 -p1
 %endif
+%if 0%{?rhel} && 0%{?rhel} < 8
+%patch3 -p1
+%endif
+
 
 # Filter unwanted Requires:
 cat << \EOF > %{name}-req
@@ -467,6 +472,7 @@ create_logfile
 * Sun Sep 23 2018 Sérgio Basto <sergio@serjux.com> - 1.18.25-5
 - Revert "Bundle a version of tar to make it compatible in EL7"
 - Keep BR: perl(Digest)
+- Remove --clamp-mtime option on tar of el7.
 
 * Sun Sep 16 2018 Sérgio Basto <sergio@serjux.com> - 1.18.25-4
 - Fix conflicts with man pages on el