$ git clone -n https://src.fedoraproject.org/rpms/rust-rustyline.git /var/lib/mock/f39-build-2251764-54112/root/chroot_tmpdir/scmroot/rust-rustyline
Cloning into '/var/lib/mock/f39-build-2251764-54112/root/chroot_tmpdir/scmroot/rust-rustyline'...
$ git fetch origin febae048d946c82b95640ea1442e4a6a1a4762c9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustyline
 * [new ref]         febae048d946c82b95640ea1442e4a6a1a4762c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at febae04 Update to version 13.0.0; Fixes RHBZ#2253049