$ git clone -n https://src.fedoraproject.org/rpms/dtk6core.git /var/lib/mock/f41-build-828032-155519/root/chroot_tmpdir/scmroot/dtk6core
Cloning into '/var/lib/mock/f41-build-828032-155519/root/chroot_tmpdir/scmroot/dtk6core'...
$ git fetch origin 1f48293156b692c2afdc2ebe88463891901289cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dtk6core
 * [new ref]         1f48293156b692c2afdc2ebe88463891901289cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f48293 Add new build dependency of dtk6log