$ git clone -n https://src.fedoraproject.org/rpms/docbook-style-dsssl.git /var/lib/mock/f40-build-1994687-43823/root/chroot_tmpdir/scmroot/docbook-style-dsssl
Cloning into '/var/lib/mock/f40-build-1994687-43823/root/chroot_tmpdir/scmroot/docbook-style-dsssl'...
$ git fetch origin de8921580b96391b8d5336ae65301bf3fff9dab9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/docbook-style-dsssl
 * [new ref]         de8921580b96391b8d5336ae65301bf3fff9dab9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de89215 Update license tag to the SPDX format (LicenseRef-DMIT)