$ git clone -n https://src.fedoraproject.org/rpms/game-music-emu.git /var/lib/mock/f45-build-9412-403/root/chroot_tmpdir/scmroot/game-music-emu
Cloning into '/var/lib/mock/f45-build-9412-403/root/chroot_tmpdir/scmroot/game-music-emu'...
$ git fetch origin a866db15486e51af0efb451ea6b4efde08a7ba63:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/game-music-emu
 * [new ref]         a866db15486e51af0efb451ea6b4efde08a7ba63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a866db1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild