$ git clone -n https://src.fedoraproject.org/rpms/libsmi.git /var/lib/mock/f45-build-17021-495/root/chroot_tmpdir/scmroot/libsmi
Cloning into '/var/lib/mock/f45-build-17021-495/root/chroot_tmpdir/scmroot/libsmi'...
$ git fetch origin 7c4f4f00c77121e32e74c8bd25a142fd5addaef2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsmi
 * [new ref]         7c4f4f00c77121e32e74c8bd25a142fd5addaef2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c4f4f0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild