$ git clone -n https://src.fedoraproject.org/rpms/unlambda.git /var/lib/mock/f31-build-70643-30518/root/chroot_tmpdir/scmroot/unlambda
Cloning into '/var/lib/mock/f31-build-70643-30518/root/chroot_tmpdir/scmroot/unlambda'...
$ git reset --hard 2664db377d46cfc1e9f59caa941dd68b12e7432c
HEAD is now at 2664db3 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild