$ git clone -n https://src.fedoraproject.org/rpms/R-BiocParallel.git /var/lib/mock/f43-build-58894717-6569073/root/chroot_tmpdir/scmroot/R-BiocParallel
Cloning into '/var/lib/mock/f43-build-58894717-6569073/root/chroot_tmpdir/scmroot/R-BiocParallel'...
$ git fetch origin 331b1855be5ccff42f18dda83ec7799d1a89da6b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-BiocParallel
 * [new ref]         331b1855be5ccff42f18dda83ec7799d1a89da6b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 331b185 R-maint-sig mass rebuild