$ git clone -n https://src.fedoraproject.org/rpms/perl-PDF-API2-XS.git /var/lib/mock/f41-build-816520-150225/root/chroot_tmpdir/scmroot/perl-PDF-API2-XS
Cloning into '/var/lib/mock/f41-build-816520-150225/root/chroot_tmpdir/scmroot/perl-PDF-API2-XS'...
$ git fetch origin 2ea5b7bc2068010dcb6b7bd05251b4c329b133bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-PDF-API2-XS
 * [new ref]         2ea5b7bc2068010dcb6b7bd05251b4c329b133bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ea5b7b Perl 5.40 rebuild