$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-video /var/lib/mock/f42-build-3429025-45391/root/chroot_tmpdir/scmroot/rust-gstreamer-video
Cloning into '/var/lib/mock/f42-build-3429025-45391/root/chroot_tmpdir/scmroot/rust-gstreamer-video'...
$ git fetch origin 671b64d7409885d7b214710865acbab04a3f37b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-video
 * [new ref]         671b64d7409885d7b214710865acbab04a3f37b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 671b64d Update to version 0.23.5; Fixes RHBZ#2333678