$ git clone -n https://src.fedoraproject.org/rpms/rccl.git /var/lib/mock/f41-build-856164-167474/root/chroot_tmpdir/scmroot/rccl
Cloning into '/var/lib/mock/f41-build-856164-167474/root/chroot_tmpdir/scmroot/rccl'...
$ git fetch origin 1667e6a46f832890361b14996f9350f9c4375f3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rccl
 * [new ref]         1667e6a46f832890361b14996f9350f9c4375f3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1667e6a Workaround gfx10* not building