$ git clone -n https://src.fedoraproject.org/rpms/python-multiecho.git /var/lib/mock/f45-build-31610-654/root/chroot_tmpdir/scmroot/python-multiecho
Cloning into '/var/lib/mock/f45-build-31610-654/root/chroot_tmpdir/scmroot/python-multiecho'...
$ git fetch origin 4268d49b8243cba0be573e2ac81abf71ebd98c3c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-multiecho
 * [new ref]         4268d49b8243cba0be573e2ac81abf71ebd98c3c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4268d49 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild