$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-player.git /var/lib/mock/f40-build-2477835-61604/root/chroot_tmpdir/scmroot/rust-gstreamer-player
Cloning into '/var/lib/mock/f40-build-2477835-61604/root/chroot_tmpdir/scmroot/rust-gstreamer-player'...
$ git fetch origin 975196f36680bfd14eacc4e62c0c6867e4be7967:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-player
 * [new ref]         975196f36680bfd14eacc4e62c0c6867e4be7967 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 975196f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild