$ git clone -n https://src.fedoraproject.org/rpms/rust-gst-plugin-dav1d.git /var/lib/mock/f42-build-side-1-3584387-46893/root/chroot_tmpdir/scmroot/rust-gst-plugin-dav1d
Cloning into '/var/lib/mock/f42-build-side-1-3584387-46893/root/chroot_tmpdir/scmroot/rust-gst-plugin-dav1d'...
$ git fetch origin bdbdca140f3318521c8f5f54342240081a342ea5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gst-plugin-dav1d
 * [new ref]         bdbdca140f3318521c8f5f54342240081a342ea5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bdbdca1 Update to version 0.13.6; Fixes RHBZ#2365927