$ git clone -n https://src.fedoraproject.org/rpms/duperemove.git /var/lib/mock/f40-build-799130-142144/root/chroot_tmpdir/scmroot/duperemove
Cloning into '/var/lib/mock/f40-build-799130-142144/root/chroot_tmpdir/scmroot/duperemove'...
$ git fetch origin f08ed9c995ccc938c07592595cee693eb9af5f57:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/duperemove
 * [new ref]         f08ed9c995ccc938c07592595cee693eb9af5f57 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f08ed9c Remove i686 support (since it's breaking builds)