$ git clone -n https://src.fedoraproject.org/rpms/postfix.git /var/lib/mock/f33-build-131164-40984/root/chroot_tmpdir/scmroot/postfix
Cloning into '/var/lib/mock/f33-build-131164-40984/root/chroot_tmpdir/scmroot/postfix'...
$ git reset --hard 75d2d6cce77c64ced7a061e881c17fd63d67b679
HEAD is now at 75d2d6c Added new sources