$ git clone -n https://src.fedoraproject.org/rpms/rust-input_buffer.git /var/lib/mock/f39-build-1466955-33710/root/chroot_tmpdir/scmroot/rust-input_buffer
Cloning into '/var/lib/mock/f39-build-1466955-33710/root/chroot_tmpdir/scmroot/rust-input_buffer'...
$ git fetch origin be859d5b5661ca3706246c597da4b631e8053566:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-input_buffer
 * [new ref]         be859d5b5661ca3706246c597da4b631e8053566 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be859d5 Regenerate with rust2rpm v24