$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-base-sys /var/lib/mock/f42-build-3429012-45391/root/chroot_tmpdir/scmroot/rust-gstreamer-base-sys
Cloning into '/var/lib/mock/f42-build-3429012-45391/root/chroot_tmpdir/scmroot/rust-gstreamer-base-sys'...
$ git fetch origin 516c73a22d21bc3fda080ee1b1faf835baa7179a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-base-sys
 * [new ref]         516c73a22d21bc3fda080ee1b1faf835baa7179a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 516c73a Update to version 0.23.5; Fixes RHBZ#2333666