$ git clone -n https://src.fedoraproject.org/rpms/libesmtp.git /var/lib/mock/f31-build-58537-28461/root/chroot_tmpdir/scmroot/libesmtp
Cloning into '/var/lib/mock/f31-build-58537-28461/root/chroot_tmpdir/scmroot/libesmtp'...
$ git reset --hard e3704037db718f55b43e29ad29b0b38033929db5
HEAD is now at e370403 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild