$ git clone -n https://src.fedoraproject.org/rpms/lua-vstruct.git /var/lib/mock/f45-build-17712-503/root/chroot_tmpdir/scmroot/lua-vstruct
Cloning into '/var/lib/mock/f45-build-17712-503/root/chroot_tmpdir/scmroot/lua-vstruct'...
$ git fetch origin 8f4fe4a5ee6ccff5116723065255a85da0094069:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lua-vstruct
 * [new ref]         8f4fe4a5ee6ccff5116723065255a85da0094069 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f4fe4a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild