$ git clone -n https://src.fedoraproject.org/rpms/kmail.git /var/lib/mock/f40-build-2218803-52622/root/chroot_tmpdir/scmroot/kmail
Cloning into '/var/lib/mock/f40-build-2218803-52622/root/chroot_tmpdir/scmroot/kmail'...
$ git fetch origin f84985a3c8eab5c3a580f03a2920269cbf890faa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmail
 * [new ref]         f84985a3c8eab5c3a580f03a2920269cbf890faa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f84985a 24.01.85