$ git clone -n https://src.fedoraproject.org/rpms/rust-gag.git /var/lib/mock/f40-build-2680765-67949/root/chroot_tmpdir/scmroot/rust-gag
Cloning into '/var/lib/mock/f40-build-2680765-67949/root/chroot_tmpdir/scmroot/rust-gag'...
$ git fetch origin e0f9e7f3000241948304438ed5fba0e5f109c898:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gag
 * [new ref]         e0f9e7f3000241948304438ed5fba0e5f109c898 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0f9e7f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild