$ git clone -n https://src.fedoraproject.org/rpms/libesmtp.git /var/lib/mock/f31-build-87230-31757/root/chroot_tmpdir/scmroot/libesmtp
Cloning into '/var/lib/mock/f31-build-87230-31757/root/chroot_tmpdir/scmroot/libesmtp'...
$ git reset --hard f4a840261d4f182044f186271a800928468a1edf
HEAD is now at f4a8402 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild