$ git clone -n https://src.fedoraproject.org/rpms/ghc-text-short.git /var/lib/mock/f39-build-1962083-43270/root/chroot_tmpdir/scmroot/ghc-text-short
Cloning into '/var/lib/mock/f39-build-1962083-43270/root/chroot_tmpdir/scmroot/ghc-text-short'...
$ git fetch origin dc0e60ca5a076f62bccbeab3d77dfb1eaaea3908:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-text-short
 * [new ref]         dc0e60ca5a076f62bccbeab3d77dfb1eaaea3908 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc0e60c revised .cabal file