$ git clone -n https://src.fedoraproject.org/rpms/lazarus.git /var/lib/mock/f40-build-803161-144196/root/chroot_tmpdir/scmroot/lazarus
Cloning into '/var/lib/mock/f40-build-803161-144196/root/chroot_tmpdir/scmroot/lazarus'...
$ git fetch origin 689905e13bd404c902707230f9d6e7ab2d8abe22:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lazarus
 * [new ref]         689905e13bd404c902707230f9d6e7ab2d8abe22 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 689905e Update to v3.2