$ git clone -n https://src.fedoraproject.org/rpms/rust-io-close.git /var/lib/mock/f40-build-2713682-72177/root/chroot_tmpdir/scmroot/rust-io-close
Cloning into '/var/lib/mock/f40-build-2713682-72177/root/chroot_tmpdir/scmroot/rust-io-close'...
$ git fetch origin dd250646e9d2776a08f84dc24c59abc0de6663ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-io-close
 * [new ref]         dd250646e9d2776a08f84dc24c59abc0de6663ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd25064 Drop unused support for old versions of the os_pipe crate