$ git clone -n https://src.fedoraproject.org/rpms/lightpack.git /var/lib/mock/f45-build-17381-498/root/chroot_tmpdir/scmroot/lightpack
Cloning into '/var/lib/mock/f45-build-17381-498/root/chroot_tmpdir/scmroot/lightpack'...
$ git fetch origin 7724bcb6da98618101bc9c11ef5cd7985288068e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lightpack
 * [new ref]         7724bcb6da98618101bc9c11ef5cd7985288068e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7724bcb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild