$ git clone -n https://src.fedoraproject.org/rpms/rust-yes.git /var/lib/mock/f29-build-5515-1314/root/thebuilddir/tmp/scmroot/rust-yes
Cloning into '/var/lib/mock/f29-build-5515-1314/root/thebuilddir/tmp/scmroot/rust-yes'...
$ git reset --hard 170bdf7617c6296a424e13bc678cdbf8c334582a
HEAD is now at 170bdf7 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild