$ git clone -n https://src.fedoraproject.org/rpms/lua-zlib.git /var/lib/mock/f45-build-17713-503/root/chroot_tmpdir/scmroot/lua-zlib
Cloning into '/var/lib/mock/f45-build-17713-503/root/chroot_tmpdir/scmroot/lua-zlib'...
$ git fetch origin 40a413d6133f1e641e1b4b60d0c4a979e3b7ee19:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lua-zlib
 * [new ref]         40a413d6133f1e641e1b4b60d0c4a979e3b7ee19 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40a413d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild