$ git clone -n https://src.fedoraproject.org/rpms/perl-PPIx-Regexp.git /var/lib/mock/f45-build-25646-612/root/chroot_tmpdir/scmroot/perl-PPIx-Regexp
Cloning into '/var/lib/mock/f45-build-25646-612/root/chroot_tmpdir/scmroot/perl-PPIx-Regexp'...
$ git fetch origin 54fe46b57a53ada828cb7d1b216f6e68052fe653:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PPIx-Regexp
 * [new ref]         54fe46b57a53ada828cb7d1b216f6e68052fe653 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 54fe46b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild