$ git clone -n https://src.fedoraproject.org/rpms/perl-XString.git /var/lib/mock/f45-build-27603-625/root/chroot_tmpdir/scmroot/perl-XString
Cloning into '/var/lib/mock/f45-build-27603-625/root/chroot_tmpdir/scmroot/perl-XString'...
$ git fetch origin d07423be2713d9ecdd94131ec67ff78ae5b42698:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XString
 * [new ref]         d07423be2713d9ecdd94131ec67ff78ae5b42698 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d07423b Perl 5.44 rebuild