$ git clone -n https://src.fedoraproject.org/rpms/perl-File-Temp.git /var/lib/mock/f40-build-2221172-52681/root/chroot_tmpdir/scmroot/perl-File-Temp
Cloning into '/var/lib/mock/f40-build-2221172-52681/root/chroot_tmpdir/scmroot/perl-File-Temp'...
$ git fetch origin 513ff66b11d8f41615d69f48e512d584bee8920d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-File-Temp
 * [new ref]         513ff66b11d8f41615d69f48e512d584bee8920d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 513ff66 Package tests