$ git clone -n https://src.fedoraproject.org/rpms/rust-dolby_vision.git /var/lib/mock/f38-build-side-43-rust-devel-1405465-31258/root/chroot_tmpdir/scmroot/rust-dolby_vision
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1405465-31258/root/chroot_tmpdir/scmroot/rust-dolby_vision'...
$ git fetch origin a66eb8d5b0e889aa8a6e2785d63b558b0abb72ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-dolby_vision
 * [new ref]         a66eb8d5b0e889aa8a6e2785d63b558b0abb72ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a66eb8d Adapt for subtle cargo_cbuild / cargo_cinstall macro changes