$ git clone -n https://src.fedoraproject.org/rpms/ghc-network.git /var/lib/mock/f38-build-side-42-init-devel-832166-28376/root/chroot_tmpdir/scmroot/ghc-network
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-832166-28376/root/chroot_tmpdir/scmroot/ghc-network'...
$ git fetch origin b68aedc9bdc60c35b4d19b39a190b2448a5aee12:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-network
 * [new ref]         b68aedc9bdc60c35b4d19b39a190b2448a5aee12 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b68aedc Convert to %autorelease and %autochangelog