$ git clone -n https://src.fedoraproject.org/rpms/lua-lunitx.git /var/lib/mock/f45-build-17670-502/root/chroot_tmpdir/scmroot/lua-lunitx
Cloning into '/var/lib/mock/f45-build-17670-502/root/chroot_tmpdir/scmroot/lua-lunitx'...
$ git fetch origin f2a5349bf5d6e6c3d32fe0ea32c93fc965cad78d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lua-lunitx
 * [new ref]         f2a5349bf5d6e6c3d32fe0ea32c93fc965cad78d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2a5349 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild