$ git clone -n https://src.fedoraproject.org/rpms/perl-PPI-XS.git /var/lib/mock/f45-build-25614-612/root/chroot_tmpdir/scmroot/perl-PPI-XS
Cloning into '/var/lib/mock/f45-build-25614-612/root/chroot_tmpdir/scmroot/perl-PPI-XS'...
$ git fetch origin f72048a3e6147a58a5975486cdc26ba45ba9a62b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PPI-XS
 * [new ref]         f72048a3e6147a58a5975486cdc26ba45ba9a62b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f72048a Perl 5.44 rebuild