$ git clone -n https://src.fedoraproject.org/rpms/perl-Spreadsheet-XLSX.git /var/lib/mock/f41-build-side-1-2781845-32532/root/chroot_tmpdir/scmroot/perl-Spreadsheet-XLSX
Cloning into '/var/lib/mock/f41-build-side-1-2781845-32532/root/chroot_tmpdir/scmroot/perl-Spreadsheet-XLSX'...
$ git fetch origin 8f0cce1a3b1c7188ac0dc572ff37e21432c3ad12:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Spreadsheet-XLSX
 * [new ref]         8f0cce1a3b1c7188ac0dc572ff37e21432c3ad12 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f0cce1 Remove EPEL 7 build-time support