$ git clone -n https://src.fedoraproject.org/rpms/ghc-unicode-transforms.git /var/lib/mock/f38-build-side-42-init-devel-922223-28737/root/chroot_tmpdir/scmroot/ghc-unicode-transforms
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-922223-28737/root/chroot_tmpdir/scmroot/ghc-unicode-transforms'...
$ git fetch origin 514a2e7977c3360d8cc2c78d502127784f672e10:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-unicode-transforms
 * [new ref]         514a2e7977c3360d8cc2c78d502127784f672e10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 514a2e7 update to 0.4.0.1