$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-audio.git /var/lib/mock/f42-build-side-1-3586676-46924/root/chroot_tmpdir/scmroot/rust-gstreamer-audio
Cloning into '/var/lib/mock/f42-build-side-1-3586676-46924/root/chroot_tmpdir/scmroot/rust-gstreamer-audio'...
$ git fetch origin 20b6cf6c887a8c79825a2afb663ed5f12a84cd07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-audio
 * [new ref]         20b6cf6c887a8c79825a2afb663ed5f12a84cd07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20b6cf6 Update to version 0.23.6; Fixes RHBZ#2365895