$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Fake.git /var/lib/mock/f45-build-22765-594/root/chroot_tmpdir/scmroot/perl-Data-Fake
Cloning into '/var/lib/mock/f45-build-22765-594/root/chroot_tmpdir/scmroot/perl-Data-Fake'...
$ git fetch origin 5d563a5e33a4c07d50b400dc593912f3e825a7ef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Fake
 * [new ref]         5d563a5e33a4c07d50b400dc593912f3e825a7ef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5d563a5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild