$ git clone -n https://src.fedoraproject.org/rpms/initial-setup.git /var/lib/mock/f39-build-1624966-39118/root/chroot_tmpdir/scmroot/initial-setup
Cloning into '/var/lib/mock/f39-build-1624966-39118/root/chroot_tmpdir/scmroot/initial-setup'...
$ git fetch origin 95058dfa8817144a31125dbd6d24c6204b794e4f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/initial-setup
 * [new ref]         95058dfa8817144a31125dbd6d24c6204b794e4f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 95058df Use correct tarball