$ git clone -n https://src.fedoraproject.org/rpms/perl-Goo-Canvas.git /var/lib/mock/f41-build-side-1-2800834-32804/root/chroot_tmpdir/scmroot/perl-Goo-Canvas
Cloning into '/var/lib/mock/f41-build-side-1-2800834-32804/root/chroot_tmpdir/scmroot/perl-Goo-Canvas'...
$ git fetch origin 437d7c46cc7b5ba2bff28ab45b7c835cf1545af5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Goo-Canvas
 * [new ref]         437d7c46cc7b5ba2bff28ab45b7c835cf1545af5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 437d7c4 convert GPL+ or Artistic license to SPDX