$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-vaapi.git /var/lib/mock/f42-build-865426-173104/root/chroot_tmpdir/scmroot/gstreamer1-vaapi
Cloning into '/var/lib/mock/f42-build-865426-173104/root/chroot_tmpdir/scmroot/gstreamer1-vaapi'...
$ git fetch origin a9337f215b9fd000f8a5116db834f64e17d4b33e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-vaapi
 * [new ref]         a9337f215b9fd000f8a5116db834f64e17d4b33e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a9337f2 1.24.11