$ git clone -n https://src.fedoraproject.org/rpms/ghc-unicode-transforms.git /var/lib/mock/f41-build-837888-159471/root/chroot_tmpdir/scmroot/ghc-unicode-transforms
Cloning into '/var/lib/mock/f41-build-837888-159471/root/chroot_tmpdir/scmroot/ghc-unicode-transforms'...
$ git fetch origin 25f6b3fc78e3f980370cb637f33f2a4e642dc3c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-unicode-transforms
 * [new ref]         25f6b3fc78e3f980370cb637f33f2a4e642dc3c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 25f6b3f update to unicode-data-0.6.0 (Unicode 15)