$ git clone -n https://src.fedoraproject.org/rpms/rust-portable-atomic.git /var/lib/mock/f40-build-2682533-67964/root/chroot_tmpdir/scmroot/rust-portable-atomic
Cloning into '/var/lib/mock/f40-build-2682533-67964/root/chroot_tmpdir/scmroot/rust-portable-atomic'...
$ git fetch origin 35e4314c7892413b9a5a3bf8f686c43d75308da3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-portable-atomic
 * [new ref]         35e4314c7892413b9a5a3bf8f686c43d75308da3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 35e4314 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild