$ git clone -n https://src.fedoraproject.org/rpms/R-V8.git /var/lib/mock/f33-build-149919-43257/root/chroot_tmpdir/scmroot/R-V8
Cloning into '/var/lib/mock/f33-build-149919-43257/root/chroot_tmpdir/scmroot/R-V8'...
$ git reset --hard b922c40aad8481d6173c234b8d18fd1263714e4e
HEAD is now at b922c40 Merge branch 'f30'