$ git clone -n https://src.fedoraproject.org/rpms/redir.git /var/lib/mock/f45-build-34418-686/root/chroot_tmpdir/scmroot/redir
Cloning into '/var/lib/mock/f45-build-34418-686/root/chroot_tmpdir/scmroot/redir'...
$ git fetch origin 10f1073e75ad2fb5f13bc2e6f3e0ba76126ec481:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/redir
 * [new ref]         10f1073e75ad2fb5f13bc2e6f3e0ba76126ec481 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10f1073 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild