$ git clone -n https://src.fedoraproject.org/rpms/fmt.git /var/lib/mock/f40-build-2663979-67034/root/chroot_tmpdir/scmroot/fmt
Cloning into '/var/lib/mock/f40-build-2663979-67034/root/chroot_tmpdir/scmroot/fmt'...
$ git fetch origin f7012efeadda8790d5f35598572ba5652ac6035a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fmt
 * [new ref]         f7012efeadda8790d5f35598572ba5652ac6035a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f7012ef Backport fix of handling of static separator