$ git clone -n https://src.fedoraproject.org/rpms/lagan.git /var/lib/mock/f41-build-1201490-22419/root/chroot_tmpdir/scmroot/lagan
Cloning into '/var/lib/mock/f41-build-1201490-22419/root/chroot_tmpdir/scmroot/lagan'...
$ git fetch origin d0b4d7939d21287ed9c1ebd47667d79607819567:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lagan
 * [new ref]         d0b4d7939d21287ed9c1ebd47667d79607819567 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0b4d79 Eliminate use of obsolete %patchN syntax (#2283636)