$ git clone -n https://src.fedoraproject.org/rpms/libva.git /var/lib/mock/f39-build-1575858-37939/root/chroot_tmpdir/scmroot/libva
Cloning into '/var/lib/mock/f39-build-1575858-37939/root/chroot_tmpdir/scmroot/libva'...
$ git fetch origin 1b379f278b01c8486250dd79757e253132818f46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libva
 * [new ref]         1b379f278b01c8486250dd79757e253132818f46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b379f2 Update to 2.20.0