$ git clone -n https://src.fedoraproject.org/rpms/ghc-connection.git /var/lib/mock/f41-build-side-1-2672308-29195/root/chroot_tmpdir/scmroot/ghc-connection
Cloning into '/var/lib/mock/f41-build-side-1-2672308-29195/root/chroot_tmpdir/scmroot/ghc-connection'...
$ git fetch origin 2f0e5311732aa9b65e68fb30a872a96950a75542:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-connection
 * [new ref]         2f0e5311732aa9b65e68fb30a872a96950a75542 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f0e531 Replaced by ghc-crypton-connection