$ git clone -n https://src.fedoraproject.org/rpms/R-BH.git /var/lib/mock/f39-build-1470437-33896/root/chroot_tmpdir/scmroot/R-BH
Cloning into '/var/lib/mock/f39-build-1470437-33896/root/chroot_tmpdir/scmroot/R-BH'...
$ git fetch origin 96fbb8e864e584d7ccebc9f9518747681fc00e3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-BH
 * [new ref]         96fbb8e864e584d7ccebc9f9518747681fc00e3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96fbb8e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild