$ git clone -n https://src.fedoraproject.org/rpms/m4ri.git /var/lib/mock/f45-build-17892-505/root/chroot_tmpdir/scmroot/m4ri
Cloning into '/var/lib/mock/f45-build-17892-505/root/chroot_tmpdir/scmroot/m4ri'...
$ git fetch origin f7a3c908d436869ec3257f11ac4fa31d03c06160:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/m4ri
 * [new ref]         f7a3c908d436869ec3257f11ac4fa31d03c06160 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f7a3c90 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild