$ git clone -n https://src.fedoraproject.org/rpms/mirage.git /var/lib/mock/f39-build-1464535-33506/root/chroot_tmpdir/scmroot/mirage
Cloning into '/var/lib/mock/f39-build-1464535-33506/root/chroot_tmpdir/scmroot/mirage'...
$ git fetch origin 34ad467a8fa20c9d3e64bda4eab953a8ce096a8f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mirage
 * [new ref]         34ad467a8fa20c9d3e64bda4eab953a8ce096a8f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 34ad467 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild