$ git clone -n https://src.fedoraproject.org/rpms/perl-MooseX-App.git /var/lib/mock/f39-build-1436933-32102/root/chroot_tmpdir/scmroot/perl-MooseX-App
Cloning into '/var/lib/mock/f39-build-1436933-32102/root/chroot_tmpdir/scmroot/perl-MooseX-App'...
$ git fetch origin a93a302aa790dd318c0e27ccf251b16ec1cd82ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-MooseX-App
 * [new ref]         a93a302aa790dd318c0e27ccf251b16ec1cd82ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a93a302 Modernize a spec file