$ git clone -n https://src.fedoraproject.org/rpms/perl-Template-Toolkit.git /var/lib/mock/f41-build-816745-150376/root/chroot_tmpdir/scmroot/perl-Template-Toolkit
Cloning into '/var/lib/mock/f41-build-816745-150376/root/chroot_tmpdir/scmroot/perl-Template-Toolkit'...
$ git fetch origin 57505da76025b3074578518d0c1a1b242d3faa07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Template-Toolkit
 * [new ref]         57505da76025b3074578518d0c1a1b242d3faa07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57505da Perl 5.40 rebuild