$ git clone -n https://src.fedoraproject.org/rpms/esmtp.git /var/lib/mock/f29-build-1247-496/root/thebuilddir/tmp/scmroot/esmtp
Cloning into '/var/lib/mock/f29-build-1247-496/root/thebuilddir/tmp/scmroot/esmtp'...
$ git reset --hard 1d2635d1dd2c5ba168ddcb53f64ab98b66c61a0c
HEAD is now at 1d2635d - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild