$ git clone -n https://src.fedoraproject.org/rpms/rust-dunce.git /var/lib/mock/f39-build-2288176-55650/root/chroot_tmpdir/scmroot/rust-dunce
Cloning into '/var/lib/mock/f39-build-2288176-55650/root/chroot_tmpdir/scmroot/rust-dunce'...
$ git fetch origin c46cb77fd1c0366b3451a792f4569217e412b20e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dunce
 * [new ref]         c46cb77fd1c0366b3451a792f4569217e412b20e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c46cb77 Remove CC0-1.0 from license metadata (not acceptable for code in Fedora)