$ git clone -n https://src.fedoraproject.org/rpms/R-BH.git /var/lib/mock/f41-build-side-1-3142740-40009/root/chroot_tmpdir/scmroot/R-BH
Cloning into '/var/lib/mock/f41-build-side-1-3142740-40009/root/chroot_tmpdir/scmroot/R-BH'...
$ git fetch origin f6dbde561282293fe2b84eda96b130ccd3c648d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-BH
 * [new ref]         f6dbde561282293fe2b84eda96b130ccd3c648d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6dbde5 convert Boost license to SPDX