$ git clone -n https://src.fedoraproject.org/rpms/rust-futures-test.git /var/lib/mock/f40-build-2129981-50787/root/chroot_tmpdir/scmroot/rust-futures-test
Cloning into '/var/lib/mock/f40-build-2129981-50787/root/chroot_tmpdir/scmroot/rust-futures-test'...
$ git fetch origin 6a52e1ca8dad531a964e8ba95ec1ccb32154b6df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-futures-test
 * [new ref]         6a52e1ca8dad531a964e8ba95ec1ccb32154b6df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a52e1c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild