$ git clone -n https://src.fedoraproject.org/rpms/rust-constant_time_eq.git /var/lib/mock/f39-build-2288047-55650/root/chroot_tmpdir/scmroot/rust-constant_time_eq
Cloning into '/var/lib/mock/f39-build-2288047-55650/root/chroot_tmpdir/scmroot/rust-constant_time_eq'...
$ git fetch origin ce3be02213559fc93d728b0cc94f5c5427102e26:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-constant_time_eq
 * [new ref]         ce3be02213559fc93d728b0cc94f5c5427102e26 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce3be02 Remove CC0-1.0 from license metadata (not acceptable for code in Fedora)