$ git clone -n https://src.fedoraproject.org/rpms/rust-lab.git /var/lib/mock/f40-build-2681566-67959/root/chroot_tmpdir/scmroot/rust-lab
Cloning into '/var/lib/mock/f40-build-2681566-67959/root/chroot_tmpdir/scmroot/rust-lab'...
$ git fetch origin 5ad2dbba5b36d55dc559386271bbb66df8e6c6a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lab
 * [new ref]         5ad2dbba5b36d55dc559386271bbb66df8e6c6a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5ad2dbb Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild