$ git clone -n https://src.fedoraproject.org/rpms/calamares.git /var/lib/mock/f40-build-768865-125426/root/chroot_tmpdir/scmroot/calamares
Cloning into '/var/lib/mock/f40-build-768865-125426/root/chroot_tmpdir/scmroot/calamares'...
$ git fetch origin 308ef21305a9dac9fa16265e0cbb35f9a0ce4103:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/calamares
 * [new ref]         308ef21305a9dac9fa16265e0cbb35f9a0ce4103 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 308ef21 Update to 3.3.0 final