$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-date.git /var/lib/mock/f40-build-2110855-50655/root/chroot_tmpdir/scmroot/ghc-http-date
Cloning into '/var/lib/mock/f40-build-2110855-50655/root/chroot_tmpdir/scmroot/ghc-http-date'...
$ git fetch origin 30b38cd68cff58dbae452060fa40bbc671266f24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-date
 * [new ref]         30b38cd68cff58dbae452060fa40bbc671266f24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30b38cd bump release