$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-directory.git /var/lib/mock/f39-build-1961913-43270/root/chroot_tmpdir/scmroot/ghc-http-directory
Cloning into '/var/lib/mock/f39-build-1961913-43270/root/chroot_tmpdir/scmroot/ghc-http-directory'...
$ git fetch origin a9551499d40732a9f706e9b46c0dc1b07a15b326:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-directory
 * [new ref]         a9551499d40732a9f706e9b46c0dc1b07a15b326 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a955149 bump release