$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-client-tls.git /var/lib/mock/f38-build-side-42-init-devel-1035206-29746/root/chroot_tmpdir/scmroot/ghc-http-client-tls
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1035206-29746/root/chroot_tmpdir/scmroot/ghc-http-client-tls'...
$ git fetch origin cec01892a654676536ea69bbb4da4c6b45f0ef0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-client-tls
 * [new ref]         cec01892a654676536ea69bbb4da4c6b45f0ef0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cec0189 Convert to %autorelease and %autochangelog