$ git clone -n https://src.fedoraproject.org/rpms/linsim.git /var/lib/mock/f45-build-17405-498/root/chroot_tmpdir/scmroot/linsim
Cloning into '/var/lib/mock/f45-build-17405-498/root/chroot_tmpdir/scmroot/linsim'...
$ git fetch origin 429ea8d23c4cb97e3241b0a464e18efe8d332987:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/linsim
 * [new ref]         429ea8d23c4cb97e3241b0a464e18efe8d332987 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 429ea8d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild