$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-vaapi.git /var/lib/mock/f41-build-808247-145747/root/chroot_tmpdir/scmroot/gstreamer1-vaapi
Cloning into '/var/lib/mock/f41-build-808247-145747/root/chroot_tmpdir/scmroot/gstreamer1-vaapi'...
$ git fetch origin 6ff963ba7c591c7426e50160479b76807c78f602:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-vaapi
 * [new ref]         6ff963ba7c591c7426e50160479b76807c78f602 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ff963b 1.24.3