$ git clone -n https://src.fedoraproject.org/rpms/lxsession.git /var/lib/mock/f40-build-2242441-53669/root/chroot_tmpdir/scmroot/lxsession
Cloning into '/var/lib/mock/f40-build-2242441-53669/root/chroot_tmpdir/scmroot/lxsession'...
$ git fetch origin 36c87606242d4a5c04afe7959440331012a0712d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lxsession
 * [new ref]         36c87606242d4a5c04afe7959440331012a0712d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36c8760 Update to the latest git