$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-base-sys.git /var/lib/mock/f40-build-2660224-66918/root/chroot_tmpdir/scmroot/rust-gstreamer-base-sys
Cloning into '/var/lib/mock/f40-build-2660224-66918/root/chroot_tmpdir/scmroot/rust-gstreamer-base-sys'...
$ git fetch origin fb6fb83cb717485b324e7c7658cae0a8fc2eb07b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-base-sys
 * [new ref]         fb6fb83cb717485b324e7c7658cae0a8fc2eb07b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb6fb83 Update to version 0.22.0; Fixes RHBZ#2263350