$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-plugins-good.git /var/lib/mock/f40-build-787952-134971/root/chroot_tmpdir/scmroot/gstreamer1-plugins-good
Cloning into '/var/lib/mock/f40-build-787952-134971/root/chroot_tmpdir/scmroot/gstreamer1-plugins-good'...
$ git fetch origin c7623cb32ce09454bc099859cc86ef739aaabd50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-plugins-good
 * [new ref]         c7623cb32ce09454bc099859cc86ef739aaabd50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c7623cb Rebuild (qt6)