$ git clone -n https://src.fedoraproject.org/rpms/perl-JSON-Pointer.git /var/lib/mock/f45-build-24284-603/root/chroot_tmpdir/scmroot/perl-JSON-Pointer
Cloning into '/var/lib/mock/f45-build-24284-603/root/chroot_tmpdir/scmroot/perl-JSON-Pointer'...
$ git fetch origin 8fe4be89e2c7a88c315f8e4e845a6d232a37b13f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-JSON-Pointer
 * [new ref]         8fe4be89e2c7a88c315f8e4e845a6d232a37b13f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fe4be8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild