$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-video-sys.git /var/lib/mock/f39-build-1651250-40489/root/chroot_tmpdir/scmroot/rust-gstreamer-video-sys
Cloning into '/var/lib/mock/f39-build-1651250-40489/root/chroot_tmpdir/scmroot/rust-gstreamer-video-sys'...
$ git fetch origin db8080a29c3ff2d67808e5987213bcb6fc609888:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-video-sys
 * [new ref]         db8080a29c3ff2d67808e5987213bcb6fc609888 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db8080a Update to version 0.21.1; Fixes RHBZ#2242113