$ git clone -n https://src.fedoraproject.org/rpms/coreutils.git /var/lib/mock/f39-build-2270398-54790/root/chroot_tmpdir/scmroot/coreutils
Cloning into '/var/lib/mock/f39-build-2270398-54790/root/chroot_tmpdir/scmroot/coreutils'...
$ git fetch origin e188652f2ccfb24e022556ddcb847ac928235ddc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/coreutils
 * [new ref]         e188652f2ccfb24e022556ddcb847ac928235ddc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e188652 fix buffer overflow in split