$ git clone -n https://src.fedoraproject.org/rpms/R-V8.git /var/lib/mock/f33-build-263949-51321/root/chroot_tmpdir/scmroot/R-V8
Cloning into '/var/lib/mock/f33-build-263949-51321/root/chroot_tmpdir/scmroot/R-V8'...
$ git reset --hard 5d43e53cce7d551fa3cc7458e5b2cbaa0fd8f7c3
HEAD is now at 5d43e53 Update to latest version.