$ git clone -n https://src.fedoraproject.org/rpms/R-backports.git /var/lib/mock/f33-build-344426-59148/root/chroot_tmpdir/scmroot/R-backports
Cloning into '/var/lib/mock/f33-build-344426-59148/root/chroot_tmpdir/scmroot/R-backports'...
$ git reset --hard a8451e125f6d2acc27cd77db8431fc1f8c5add70
HEAD is now at a8451e1 Update to latest version.