$ git clone -n https://src.fedoraproject.org/rpms/ghc-shakespeare.git /var/lib/mock/f38-build-side-42-init-devel-1040609-29757/root/chroot_tmpdir/scmroot/ghc-shakespeare
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1040609-29757/root/chroot_tmpdir/scmroot/ghc-shakespeare'...
$ git fetch origin 2a08c102006e079e95279607f9404bed4827d25e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-shakespeare
 * [new ref]         2a08c102006e079e95279607f9404bed4827d25e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a08c10 Convert to %autorelease and %autochangelog