$ git clone -n https://src.fedoraproject.org/rpms/perl-Authen-Krb5-Admin.git /var/lib/mock/f41-build-1280414-23185/root/chroot_tmpdir/scmroot/perl-Authen-Krb5-Admin
Cloning into '/var/lib/mock/f41-build-1280414-23185/root/chroot_tmpdir/scmroot/perl-Authen-Krb5-Admin'...
$ git fetch origin 063324e20372db01dfd8a0c83c61cdd6f374fa9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Authen-Krb5-Admin
 * [new ref]         063324e20372db01dfd8a0c83c61cdd6f374fa9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 063324e Perl 5.40 rebuild