$ git clone -n https://src.fedoraproject.org/rpms/meow.git /var/lib/mock/f45-build-39649-750/root/chroot_tmpdir/scmroot/meow
Cloning into '/var/lib/mock/f45-build-39649-750/root/chroot_tmpdir/scmroot/meow'...
$ git fetch origin 09206ed41495b15b1ef61e39e8ae0187fb252680:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/meow
 * [new ref]         09206ed41495b15b1ef61e39e8ae0187fb252680 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 09206ed Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild