$ git clone -n https://src.fedoraproject.org/rpms/rust-memmem.git /var/lib/mock/f40-build-2653087-66898/root/chroot_tmpdir/scmroot/rust-memmem
Cloning into '/var/lib/mock/f40-build-2653087-66898/root/chroot_tmpdir/scmroot/rust-memmem'...
$ git fetch origin 65ad998af3cda06164a982200711890e33f0c6e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-memmem
 * [new ref]         65ad998af3cda06164a982200711890e33f0c6e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65ad998 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild