$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer.git /var/lib/mock/f40-build-2477822-61604/root/chroot_tmpdir/scmroot/rust-gstreamer
Cloning into '/var/lib/mock/f40-build-2477822-61604/root/chroot_tmpdir/scmroot/rust-gstreamer'...
$ git fetch origin 8f81e3b774978e8d9ff59834b6d3550d472b0f4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer
 * [new ref]         8f81e3b774978e8d9ff59834b6d3550d472b0f4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f81e3b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild