$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-plugin-libav.git /var/lib/mock/f40-build-2290220-55961/root/chroot_tmpdir/scmroot/gstreamer1-plugin-libav
Cloning into '/var/lib/mock/f40-build-2290220-55961/root/chroot_tmpdir/scmroot/gstreamer1-plugin-libav'...
$ git fetch origin 2e3bd82c5fd85e2612724cdd62d82af17743f324:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-plugin-libav
 * [new ref]         2e3bd82c5fd85e2612724cdd62d82af17743f324 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e3bd82 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild