$ git clone -n https://src.fedoraproject.org/rpms/tiled.git /var/lib/mock/f40-build-1957303-25198/root/chroot_tmpdir/scmroot/tiled
Cloning into '/var/lib/mock/f40-build-1957303-25198/root/chroot_tmpdir/scmroot/tiled'...
$ git fetch origin 7cbd38837de01d9c03ac8702bce3449f5c6d4f8b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tiled
 * [new ref]         7cbd38837de01d9c03ac8702bce3449f5c6d4f8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7cbd388 Build in release mode (rhbz#2260307)