$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-TokeParser.git /var/lib/mock/f45-build-27600-625/root/chroot_tmpdir/scmroot/perl-XML-TokeParser
Cloning into '/var/lib/mock/f45-build-27600-625/root/chroot_tmpdir/scmroot/perl-XML-TokeParser'...
$ git fetch origin dbe1e5660b7fc5d58b2889ad1b6d8ac02d3522cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-TokeParser
 * [new ref]         dbe1e5660b7fc5d58b2889ad1b6d8ac02d3522cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dbe1e56 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild