$ git clone -n https://src.fedoraproject.org/rpms/R-V8.git /var/lib/mock/f33-build-597177-66907/root/chroot_tmpdir/scmroot/R-V8
Cloning into '/var/lib/mock/f33-build-597177-66907/root/chroot_tmpdir/scmroot/R-V8'...
$ git reset --hard 1ccf1453a2b5907711e0f7e105be1d2ed251c141
HEAD is now at 1ccf145 Update to latest version.