$ git clone -n https://src.fedoraproject.org/rpms/ipsilon.git /var/lib/mock/f39-build-1505758-35160/root/chroot_tmpdir/scmroot/ipsilon
Cloning into '/var/lib/mock/f39-build-1505758-35160/root/chroot_tmpdir/scmroot/ipsilon'...
$ git fetch origin 05d5bc226ae998491c7ffa2ae9a195c464ecc961:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ipsilon
 * [new ref]         05d5bc226ae998491c7ffa2ae9a195c464ecc961 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05d5bc2 backport upstream patch 64a9d5e