$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-plugins-good.git /var/lib/mock/f39-build-2081137-49740/root/chroot_tmpdir/scmroot/gstreamer1-plugins-good
Cloning into '/var/lib/mock/f39-build-2081137-49740/root/chroot_tmpdir/scmroot/gstreamer1-plugins-good'...
$ git fetch origin 27e7fa85f68fd7efa8515060a49fc85bf4b1622e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-plugins-good
 * [new ref]         27e7fa85f68fd7efa8515060a49fc85bf4b1622e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27e7fa8 Merge branch 'rawhide' into f39