$ git clone -n https://src.fedoraproject.org/rpms/duc.git /var/lib/mock/f45-build-7793-370/root/chroot_tmpdir/scmroot/duc
Cloning into '/var/lib/mock/f45-build-7793-370/root/chroot_tmpdir/scmroot/duc'...
$ git fetch origin bc8035aba6a85bc59ce27cc0125daf5f72111d93:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/duc
 * [new ref]         bc8035aba6a85bc59ce27cc0125daf5f72111d93 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc8035a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild