$ git clone -n https://src.fedoraproject.org/rpms/perl-Proc-SyncExec.git /var/lib/mock/f41-build-side-1-2654844-27881/root/chroot_tmpdir/scmroot/perl-Proc-SyncExec
Cloning into '/var/lib/mock/f41-build-side-1-2654844-27881/root/chroot_tmpdir/scmroot/perl-Proc-SyncExec'...
$ git fetch origin 5718a45035bd2567301d5c66bbd2856d8a96700c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Proc-SyncExec
 * [new ref]         5718a45035bd2567301d5c66bbd2856d8a96700c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5718a45 convert GPL+ or Artistic license to SPDX