$ git clone -n https://src.fedoraproject.org/rpms/douceur.git /var/lib/mock/f39-build-1507987-35326/root/chroot_tmpdir/scmroot/douceur
Cloning into '/var/lib/mock/f39-build-1507987-35326/root/chroot_tmpdir/scmroot/douceur'...
$ git fetch origin deffef8623566c758aca1d65c321be1fbd49ef0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/douceur
 * [new ref]         deffef8623566c758aca1d65c321be1fbd49ef0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at deffef8 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild