$ git clone -n https://src.fedoraproject.org/rpms/rust-docopt.git /var/lib/mock/f29-build-6873-1694/root/thebuilddir/tmp/scmroot/rust-docopt
Cloning into '/var/lib/mock/f29-build-6873-1694/root/thebuilddir/tmp/scmroot/rust-docopt'...
$ git reset --hard 4479a19c36baaa3b471f95e1664b040e1cf8a1bf
HEAD is now at 4479a19 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild