$ git clone -n https://src.fedoraproject.org/rpms/libappstream-glib.git /var/lib/mock/f45-build-15843-480/root/chroot_tmpdir/scmroot/libappstream-glib
Cloning into '/var/lib/mock/f45-build-15843-480/root/chroot_tmpdir/scmroot/libappstream-glib'...
$ git fetch origin bffacda1774d0f52c4fb5bff33aa41fdf2ef55fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libappstream-glib
 * [new ref]         bffacda1774d0f52c4fb5bff33aa41fdf2ef55fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bffacda New upstream release