$ git clone -n https://src.fedoraproject.org/rpms/lazarus.git /var/lib/mock/f41-build-857633-168154/root/chroot_tmpdir/scmroot/lazarus
Cloning into '/var/lib/mock/f41-build-857633-168154/root/chroot_tmpdir/scmroot/lazarus'...
$ git fetch origin 0b2bffe564001c054f27b321700c0594934429d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lazarus
 * [new ref]         0b2bffe564001c054f27b321700c0594934429d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b2bffe Update to v3.6