$ git clone -n https://src.fedoraproject.org/rpms/ipsilon.git /var/lib/mock/f41-build-side-1-2999660-36274/root/chroot_tmpdir/scmroot/ipsilon
Cloning into '/var/lib/mock/f41-build-side-1-2999660-36274/root/chroot_tmpdir/scmroot/ipsilon'...
$ git fetch origin e9a1e81011af937c32b1b593f48784d3b7346b47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ipsilon
 * [new ref]         e9a1e81011af937c32b1b593f48784d3b7346b47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9a1e81 convert GPLv3+ license to SPDX