$ git clone -n https://src.fedoraproject.org/rpms/perl-Tree-DAG_Node.git /var/lib/mock/f45-build-27243-622/root/chroot_tmpdir/scmroot/perl-Tree-DAG_Node
Cloning into '/var/lib/mock/f45-build-27243-622/root/chroot_tmpdir/scmroot/perl-Tree-DAG_Node'...
$ git fetch origin 659024e75ec1fb843991a72a3714a49a8ef3e4b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tree-DAG_Node
 * [new ref]         659024e75ec1fb843991a72a3714a49a8ef3e4b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 659024e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild