$ git clone -n https://src.fedoraproject.org/rpms/rust-new_debug_unreachable.git /var/lib/mock/f40-build-2062892-49167/root/chroot_tmpdir/scmroot/rust-new_debug_unreachable
Cloning into '/var/lib/mock/f40-build-2062892-49167/root/chroot_tmpdir/scmroot/rust-new_debug_unreachable'...
$ git fetch origin b367d43a8eb6eb98cc1f6a94f39a71eb5d888a6b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-new_debug_unreachable
 * [new ref]         b367d43a8eb6eb98cc1f6a94f39a71eb5d888a6b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b367d43 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild