$ git clone -n https://src.fedoraproject.org/rpms/rust-rustyline-derive.git /var/lib/mock/f40-build-2063582-49167/root/chroot_tmpdir/scmroot/rust-rustyline-derive
Cloning into '/var/lib/mock/f40-build-2063582-49167/root/chroot_tmpdir/scmroot/rust-rustyline-derive'...
$ git fetch origin ba49137a04176d2162b1597276f73ed9aba19668:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustyline-derive
 * [new ref]         ba49137a04176d2162b1597276f73ed9aba19668 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba49137 Update to version 0.9.0; Fixes RHBZ#1994692