$ git clone -n https://src.fedoraproject.org/rpms/perl-perlindex.git /var/lib/mock/f45-build-27718-625/root/chroot_tmpdir/scmroot/perl-perlindex
Cloning into '/var/lib/mock/f45-build-27718-625/root/chroot_tmpdir/scmroot/perl-perlindex'...
$ git fetch origin f52ae9b539f37854cf3aa766fb933b48d0a75673:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-perlindex
 * [new ref]         f52ae9b539f37854cf3aa766fb933b48d0a75673 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f52ae9b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild