$ git clone -n https://src.fedoraproject.org/rpms/postfix.git /var/lib/mock/f31-build-54897-28069/root/chroot_tmpdir/scmroot/postfix
Cloning into '/var/lib/mock/f31-build-54897-28069/root/chroot_tmpdir/scmroot/postfix'...
$ git reset --hard 7c7ffc4f1a0b106aeb8fd05d1729ff0a60d5afa1
HEAD is now at 7c7ffc4 New version   Resolves: rhbz#1726462