$ git clone -n https://src.fedoraproject.org/rpms/ghc-socks.git /var/lib/mock/f41-build-838858-159865/root/chroot_tmpdir/scmroot/ghc-socks
Cloning into '/var/lib/mock/f41-build-838858-159865/root/chroot_tmpdir/scmroot/ghc-socks'...
$ git fetch origin f93e402857a0458b37f3acf82d3903320a4b9a65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-socks
 * [new ref]         f93e402857a0458b37f3acf82d3903320a4b9a65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f93e402 bump release